REL HT/1205 User manual
Operang Instrucons for the
SerieHT
Sub-Bass
System
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Cauon Marking Explanaon
The lightning ash with arrowhead symbol within an equilateral triangle is intended to alert the
user to the presence of un-insulated dangerous voltage within the product’s enclosure that may
be of sucient magnitude to constute a risk of electric shock to persons.
The exclamaon point within an equilateral triangle is intended to alert the user to the presence
of important operang and maintenance (servicing) instrucons in the literature accompanying
the appliance.
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1 Read all of these instrucons.
2 Save these instrucons for future use.
3 Heed all warnings.
4 Follow all instrucons.
5 Do not use this apparatus near water.
6 Clean only with damp cloth.
7 Install in accordance with the manufacturer’s instrucons.
8 Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including
ampliers) that produce heat.
9 Do not defeat the safety purpose of the grounding-type plug. A grounding type plug has two blades and
a third grounding prong. The third prong is provided for your safety. If the provided plug does not t into
your outlet, consult and electrician for replacement of the obsolete outlet.
10 Protect the power cord from being walked on or pinched parcularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
11 Only use aachments/accessories specied by the manufacturer.
12 Use only with a cart, stand, tripod, bracket, or table specied by the manufacturer, or sold with the
apparatus. When a cart is used, use cauon when moving the cart/apparatus combinaon to avoid
injury from p-over.
13 Unplug this apparatus during lightning storms or when unused for long periods of me.
14 Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been exposed to rail or moisture, does not operate
normally, or has been dropped.
Important Safety Instrucons
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15 Minimum distances 10cm around the apparatus for sucient venlaon.
16 The venlaon should not be impeded by covering the venlaon openings with items, such as
newspapers, table-cloths, curtains, etc.
17 No naked ame sources, such as lighted candles, should be placed on the apparatus.
18 Aenon should be drawn to the environmental aspects of baery disposal.
19 The use of apparatus in moderate climates.
20 Baeries shall not be exposed to excessive heat such as sunshine, re or the like.
Cauon: Any changes or modicaons not expressly approved by the party responsible for compliance
could void the user’s authority to operate this equipment.
Warning
To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture.
The apparatus shall not be exposed to dripping or splashing and no objects lled with liquids, such as vases,
shall be placed on apparatus.
The mains plus is used as disconnect device. The mains plug of the apparatus should not be obstructed OR
should be easily accessed during intended use. To be completely disconnected from the power input, the
mains plug of the apparatus shall me disconnected from the mains.
An appliance with a protecve earth terminal should be connected to a mains outlet with a protecve
earth connecon.
Design Safety
This apparatus is supplied with a detachable mains cord. For 240V operaon a 7A fuse is ed in the socket,
for 120V operaon a 15A fuse is ed. Should the fuse need to be replaced use a similar rated fuse approved
to ASTA or BSI 362 standards. Do not use without the fuse cover in place. Replacement fuse covers are
available from your distributor.
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Aenon Explicaon Marquage
L’éclair avec le symbole de pointe de èche dans un triangle équilatéral est desné à alerter
l’ ulisateur de la présence de non isolée tension dangereuse à l’intérieur de l’enceinte du
produit qui peut être d’une ampleur susante pour constuer un risque d’électrocuon pour
les personnes.
Le point d’exclamaon dans un triangle équilatéral est desné à alerter l’ulisateur de la
présence d’instrucons dans la documentaon accompagnant l’appareil exploitaon et de
maintenance (entreen).
1 Lisez aenvement ces instrucons.
2 Conservez ces instrucons.
3 Respectez tous les averssements.
4 Suivez toutes les instrucons.
5 Ne pas uliser cet appareil près de l’eau.
6 Neoyer uniquement avec un chion humide.
7 Installer conformément aux instrucons du fabricant.
8 Ne pas installer près de sources de chaleur telles que des radiateurs, registres de chaleur, poêles ou
autres appareils (y compris les amplicateurs) qui produisent de la chaleur.
Informaons Importantes Relaves a la Securite
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9 Ne pas contourner le disposif de sécurité de la prise de terre. Une che de terre a deux lames et une
troisième broche de mise à la terre. La troisième broche est fournie pour votre sécurité. Si la che fournie
ne rentre pas dans votre prise, consultez un électricien pour le remplacement de la prise obsolète.
10 Protégez le cordon d’alimentaon ne soit piéné ou pincé, en parculier au niveau des ches, des prises
de courant, et le point de sore de l’appareil.
11 Ulisez uniquement des xaons/accessoires spéciés par le fabricant.
12 Ulisez seulement avec un chariot, stand, trépied, support ou table spécié par le fabricant, ou vendu
avec l’appareil. Lorsque vous ulisez un chariot, soyez prudent lorsque vous déplacez l’ensemble
chariot/appareil pour éviter les blessures en cas de chute.
13 Débranchez cet appareil pendant un orage ou lorsqu’il est inulisé storsm pour de longues périodes
de temps.
14 Conez toute réparaon à un personnel qualié. Une réparaon est nécessaire lorsque l’appareil a été
endommagé de quelque façon que ce cordon d’alimentaon ou la che est endommagé, du liquide a
été renversé ou des objets sont tombés dans l’appareil, l’appareil a été exposé à rail ou à l’humidité, ne
fonconne pas normalement, ou a été échappé.
15 10cm distance minimale autour de l’appareil pour une aéraon susante.
16 Il convient que l’aéraon ne soit pas gênée par l’obstrucon des ouvertures d’aéraon par des objets tels
que journaux, nappes, rideaux, etc.
17 Il convient de ne pas placer sur l’appareil de sources de ammes nues, telles que des bougies allumées.
18 Il convient d’arer l’aenon sur les problèmes d’environnement dus à la mise au déchet des piles.
19 Si l’appareil est desné à être ulisé sous un climat tempéré.
20 Les baeries ne doivent pas être exposées à une chaleur excessive telle que celle du soleil, d’un feu ou d’origine.
Aenon: Tout changement ou modicaon non expressément approuvés par la pare responsable de la
conformité pourraient annuler l’autorité de l’ulisateur à uliser cet équipement.
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Averssement
Cet arcle est lourd. Pour éviter tout risque de blessure, prendre soin lors de la manipulaon.
L’ appareil ne doit pas être exposé à des éclaboussures et aucun objet rempli de liquide, comme des vases,
ne doit être placé sur l’appareil.
Les conduites Plus est ulisé comme disposif de déconnexion. La che de l’appareil ne doit pas être
obstruée OU doit être facilement accessible pendant l’ulisaon. Pour être complètement déconnecté de
l’alimentaon électrique, le cordon d’alimentaon de l’appareil doit me débranché.
Un appareil avec une borne de terre doit être branché sur une prise de courant en étant relié à la terre.
Sécurité Design
Cet appareil est livré avec un cordon amovible cordon. Pour le Fonconnement d’un fusiblede 240V 7A
est montee la douille, pour le fonconnement de 120V un fusible de 15A est monté. Si le fusible doit être
remplacé ulisaon un fusible similaire approuvé pour ASTA ou BSI normes 362. Ne pas uliser sans le
couvercle de fusible en place. Les couvercles de rechange sont disponibles auprès de votre distributeur.
FCC STATEMENT
This device complies with Part 15 of the FCC Rules. Operaon is subject to the following two condions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause
undesired operaon.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital Device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protecon against harmful interference in a residenal installaon.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instrucons, may cause harmful interference to radio communicaons. However, there is no guarantee that the interference will
not occur in a parcular installaon. If this equipment does cause harmful interference to radio or television recepon, which can
be determined by turning the equipment o and on, the user is encouraged to try and correct the interference by one or more of
the following measures:
Reorient or relocate the receiving antenna.
Increase the separaon between the equipment and receiver.
Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
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Dear REL Owner,
Thank you for the purchase of your new SerieHT, a new direcon in the evoluon of subwoofers for REL.
You see, for more than a quarter century, REL have built the most remarkable dual-purpose powered
subwoofers; we call them Sub Bass Systems. Subs capable of rendering music at an unimaginably high level,
yet also able to pound out powerful theater when called upon to do so.
But what if we didn’t require both to be accomplished with equal facility? What if we built a purpose-specic
range designed, in the case of HT, just to deliver devastang home theater bass? Might we not be able to
deliver more output, more of the extreme volume levels theater can call for at lower cost than a true
dual-purpose fully specied tradional REL?
The answer is an unqualied “Yes”! HT delivers extreme levels of output and the truly visceral thrill of movies
and does so at a cost that is incredibly aordable.
For REL tradionalists, these have something to oer the exisng system owner interested in upgrading
their theater experience, yet very happy with their REL’s musical performance. HT makes it possible to
upgrade and update their theater, whilst retaining their original classic RELs for a cost that is a small fracon
of their system. And do so without needing to trade-in anything from their former system to obtain an
enormous upgrade in the performance of their theater. HT delivers this without otherwise negavely
aecng the performance of their exisng high end 2- channel system.
We believe HT will open up the world of REL to a large body of enthusiasts, old and new, and in doing so
deliver the magical world of theater sound in a uniquely REL way.
Enjoy Your Time at the Movies!
Best,
John Hunter
Lead Designer, Owner
Dear Friend and Valued Customer
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1 Power Pilot Light: Power On/O indicator.
2 O/ On/Auto Switch: Used to toggle between O (Le), Always On (middle) and Auto On mode (right).
3 Phase: Used to set phase 0-180 degrees.
4 Crossover: Used to adjust crossover frequency. Variable between 40-250Hz.
5 Level: Volume control for Input.
6 Le & Right Channel Low-Level RCA Input: Used to connect low-level signals to the sub-bass system
from the output of a preamplier, integrated amplier or receiver.
(For home cinema use, use .1/LFE input)
7 RCA Output: Used to connect or “daisy chain” another REL in tandem.
8 Power On/O Switch: Use to turn unit on or o.
9 Mains Select Switch: Slide switch used to set input AC between 120VAC and 230VAC.
10 IEC Mains Socket: Fused mains (AC) input socket that accepts detachable power cord.
REL SerieHT Rear Panel Connecon Legend
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Always switch o your system before disconnecng any wires.
To simplify and to increase the versality and of connecng, the SerieHT models have two low-level RCA
inputs. This is to facilitate ability use with both AV surround sound systems, two-channel stereo systems and
powered speakers.
Low-Level Inputs
.1/LFE Input
There is a single RCA jack labeled .1/LFE for LFE connecon to a processor. Plug one end of the RCA to RCA
cable into the .1/LFE jack of the REL and the other end into the SUB OUT Jack of your processor.
The dual RCA jacks can be used for stereo low-level connecon to the output a stereo processor source or
powered speakers. When using stereo inputs, plug one end of the RCA to RCA cables into both of the LOW
LEVEL INPUT jacks of the REL and the other end into the le and right channel output of your preamplier.
The upper frequency amplicaon of these inputs can be limited using the CROSSOVER control. This
CROSSOVER control is labeled LFE at its maximum set point which indicates this should be the seng when
the source itself is frequency limited such as a SUB OUT connecon from a processor.
Phase Switch
The phase control on a REL has two posions, 0 and 180. One of these posions will set the REL in phase
with the speakers, and one will set it out of phase. The labels 0 and 180 are just labels and tell us nothing
about the rest of the system, only if the REL is working with the speakers or not. Whichever posion results
in the loudest and fullest sub bass, is the correct posion.
We want the REL to work in harmony with the speakers, reinforcing bass, not cancelling it. In other words,
we want the drivers in the speakers and the REL to move forward at the same me and move backward at
the same me. When this happens, it results in an increase in sub bass volume and the pressurizaon in the
room and they are in phase. The opposite is if the speakers and REL are working against each other causing
cancelaon of low bass. We call this out of phase.
Connecng Up
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With the REL SerieHT, there are two basic ways to connect and setup. The rst is a single channel input from
the sub out of a theater or power speaker system. In this case a single RCA cable is need and the CROSSIVER
control can be set to LFE since the source will have an internal upper frequency limit. The second is a stereo
input from a stereo preamp or powered speaker system. Here there will be the need for two RCA cables and
the user can set the upper frequency limit using the CROSSOVER control.
Connecng and Seng Up
Place in desired posion. While your REL has been designed to be extremely easy to posion and achieve
excellent results, careful placement along the same wall as the screen will yield improvements. Listen for
increases in deep bass output as well as precision of bass notes when seng up.
Theater connecon (Sub Out connecton)
Connect RCA cable from Sub Out of theater processor to LFE input of SerieHT.
• Adjust LEVEL control to 10 o’clock.
• Adjust CROSSOVER control to LFE (maximum).
• Plug in AC cord.
• Power on with switch next to AC input.
• Set toggle below STATUS light to ON.
• Fine tune LEVEL control using a known powerful .1 chapter to make sure your seng is not too high or
damage can occur.
• Set CROSSOVER control lower to eliminate upper bass boom.
REL Set-Up Made Simple
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Stereo connecon (Powered Speaker connecon)
Connect RCA from output to right input for mono or both le and right for stereo.
• Adjust LEVEL control to 10 o’clock.
• Adjust CROSSOVER control to 10 o’clock.
• Plug in AC cord.
• Power on with switch next to AC input.
• Set toggle below STATUS light to ON.
• Fine tune LEVEL control to blend with powered speakers.
• Fine tune CROSSOVER control to blend.
Note: The relaonship between the CROSSOVER and LEVLEL will become inverse, meaning that small
increases in CROSSOVER may require similar decreases in LEVEL.
Note: Place carefully, While your REL has been designed to be extremely easy to posion and achieve excellent
results, careful placement along the same wall as the screen will yield improvements. Listen for increases in
deep bass output as well as precision of bass notes when seng up.
Phase Orientaon
Once connected, we need to adjust for phase. This may be the single most crical step, and because it really
is quite simple, it is oen over-thought. Keep in mind; the right phase is whichever posion is the loudest or
fullest. While playing music with true low bass, adjust the crossover to a point where the REL and the speaker
are sure to share frequencies at 50Hz on the crossover control, or slightly higher for smaller speakers. At
this point turn the HI/LO LEVEL control up so that both the REL and speaker are roughly equal in volume and
then switch, using the phase switch, from “0” to “180” phase posions. Again, whichever posion is loudest
or fullest is the correct posion. That is, when the posion is working in harmony with your main speakers,
reinforcing bass, not canceling it.
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Crossover and Level Sengs:
To determine the crossover point, take the volume of the REL (using the Level control) all the way down,
and put the crossover to 10 o’clock. At this point, bring the REL’s volume back up slowly to the point where
you have achieved a subtle balance, i.e. the point at which you can just hear the SerieHT even with the
main speakers playing. First, bring the crossover point up unl it is obviously too high; now gently reduce
frequency to the appropriate seng. For all intents and purposes, this is the correct crossover point. Once
this stage has been reached, subtle changes to volume and crossover may be accomplished to provide the
last bit of complete and seamless integraon. With that, set-up is complete.
Hint: There may be a tendency to set the crossover point too high and the volume of the Sub-Bass System
too low when rst learning how to integrate a REL with the system, the fear being one of overwhelming the
main speakers with bass. In making this common error, the resulng set-up will be lacking in bass depth and
dynamics. The proper crossover point and volume seng will increase overall dynamics, allow for extended
bass frequencies, and improve soundstage properes. Note, volume adjustments may need to be made to
oset the eects of crossover changes. In general, when selecng a lower crossover point, more volume may
need to be applied. Higher crossover frequencies will generally necessitate less gain.
Running In
Care taken during run in will be rewarded by many years of pleasurable use. Both the electronics and the
drive unit will benet from an inial period of carefully controlled use. Possible damage may be sustained
by running in the unit at too high a volume seng over an extended period. On the other hand, by taking a
lile care over this inial period, about 24 hours of actual use, a longer life with a higher potenal eventual
performance is assured.
Care and Polishing
The cabinets are best maintained by using only a damp cloth on the vinyl. For the top insert, please use
automobile polish made by reputable manufacturers. Our favorites are those made by Meguiars and
Mother’s. Be careful not to get any polish in the gaps or on the vinyl as it will be hard to clean out. If objects
are to be placed upon the top, it is advisable to use a small mat to protect the surface and to avoid the risk
of rales.
The SerieHT employs an advanced lter circuit which provides exceponal performance when coupled to
the rest of the signal chain of the Sub-Bass System.
The amplier is inherently stable and will retain its characteriscs over very long periods of me – important
in a unit designed for an exceponally long working life. These ampliers are designed to withstand reasonable
abuse and overloads. If in doubt, please contact your dealer.
We believe that the importance of the electronics, cabinet and drivers being designed to work in harmony is
paramount. This belief allows SerieHT to achieve the highest possible level of delity.
Overload Protecon
All REL Sub-Bass Systems are designed as true sub bass speakers. They are designed to reproduce those
exceponally deep notes that are felt as well as heard. This it will aempt to do at whatever volume level
you set. If set too high no damage should result because the built-in electronics will limit the cone movement.
This electronic control is called Set-Safe™. It constantly and instantaneously monitors the output from the
power amplier and is totally transparent in operaon unl required. This means it has absolutely no eect
on the sound quality of your REL unl an overload is detected.
Ordinarily an overload would cause the power amplier to go into clipping with resultant loss of control over
the drive unit. This can cause drive unit damage, and always sounds nasty. Set-Safe™ detects the point of
incipient clipping and gently so-clips the waveform of the signal to ensure actual clipping does not occur.
This is a necessarily simplied descripon of what actually happens, but in eect, Set-Safe™ controls the
amplier and ensures there is minimum risk of amplier and driver damage caused by over-driving.
A thermal overload device is ed to all SerieHT Sub-Bass Systems. If the unit is deliberately over-driven
this device will sense the temperature rise and cut the output; recovery me is approximately ve minutes.
If this happens, it is a warning that the unit is being over-driven and the volume level control should be
reduced to a safe level.
Although everything possible has been done to minimize risk of thermal overload failure, there can be
no defense against those individuals who deliberately abuse the device. Such damage is NOT covered by
warranty. Please remember your REL is there to supplement your main system, not overwhelm it!
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Technical
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Power Saving Eciency
All REL sub bass system designs ulize a true Power On-O switch that aords the owner the ability to
turn o their unit completely, without having to unplug the A/C mains cord. When a REL sub bass system is
switched o using the Power On-O switch on the rear panel it draws ZERO power.
In addion to the power switch there is an OFF/ON/AUTO mode switch has three posions. Far le is OFF,
middle is ALWAYS ON and far right is AUTO.
The SerieHT features an AUTO standby mode that is enabled when the power mode switch on the rear of
the unit is set to the “AUTO” posion. In this mode, the input signal is constantly monitored for audio acvity.
If not audio informaon is detected over a period of 30 minutes, the unit will enter a low power standby
mode in which less power is consumed. When input signal acvity is detected, the unit resumes normal
operaon. By using the standby mode, you can ensure that there is no unnecessary power draw when the
unit is not in use.
Note: Due to variaons in program material, it is impossible to produce a perfectly reliable standby circuit.
Bass rich music or eects will consistently trigger our standby circuit whilst content that is low in volume and
possesses lile or no bass cannot be relied upon to trip the standby funcon.
Alternavely, the user has the opon to leave the unit in the normal operaon mode at all mes by selecng
the “ON” posion of the power mode switch. Leaving a REL on, produces the best sonic performance and
the most reliable operaon. In this mode, the unit will not enter standby regardless of whether or not there
is acvity at the input. Using this seng ensures that the SerieHT is ready to react instantaneously to bass
transients, whether in music or lms.
Model Power Draw at Standby Power Draw at Idle
HT/1205 > 0.5 Was 12 Was
HT/1003 > 0.5 Was 10 Was
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Type: Closed box, front ring woofer
Drive Unit: 12 in., Glass ber reinforced cone with inverted dust cap
In Room
Lower Frequency Response: -6dB at 22Hz
Input Connectors: Low Level stereo RCA, LFE RCA
Output Connectors: Low Level stereo RCA, LFE RCA
Gain Control Range: 95 dB
Power Output: 500 was (RMS)
Phase Switch: Yes, 0 or 180 degrees
Amplier Type: Class D
Fully Electronic with SET-SAFE: Yes
DC Fault: Yes
Output Short: Yes
Mains Input Voltage: 220-240 volts, 110-120 volts for certain markets
Fuses: 8 Amp semi delay 230 volts operaon
8 Amp semi delay 115 volts operaon
Dimensions
W x H x D, Inc. Feet: Including feet and rear panel controls
15 x 16 x 15.7 in., (376 x 405 x 399 mm)
Net Weight: 42.3 lbs. (19.2 kg)
Finish: Vinyl
Supplied Accessories
Mains Lead: Yes
Users Setup guide: Yes
HT/1205 Specicaons
This manual suits for next models
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