Hafler trans-nova 9505 User manual

Amplifier
9505
CIRCUITRY
• All Discrete Circuitry
• JFET Front End
• trans• nova Amplifier Topology
• MOSFET Output Devices
• DIAMOND Driver Stage
• Internal Rail Fuses
• No Fan! Convection Cooled
CONTROLS & INDICATORS
• 5.25” Rack Mount (3-rack spaces)
• Stereo/Bridged Mono
• XLR or 1/4” Balanced Inputs
• Gold-Plated RCA Unbalanced Inputs
• Gold-Plated 5-Way Binding Posts
• Power Lamp
• Chassis/Float Ground Switch
• Rack Mount Handles
WARRANTY
• 7 Year Warranty
FEATURES
®
DESCRIPTION
The 9505 model sets a new standard of sonic excellence for professional
applications. Utilizing Jim Strickland’s JFET input/MOSFET output trans•nova
circuitry along with his brilliant DIAMOND driver stage creates the ultimate
balanced amplifier.
The TRANSconductance Nodal Voltage Amplifier
(patent #4467288) is a simple three-stage design
delivering unparalleled speed and accuracy. The
Dynamically Invariant Amplification Optimized
Nodal Drive combines the linearity of Class A op-
erationwiththecurrentheadroomofaClassBsys-
tem, resulting in a significant advancement in the
art of power amplifier design. The sonic result of all
this unique technology presents a deep, wide sound stage with in-
credible musical transparency and detail.
Many so-called “balanced” amplifiers are merely conventional unbalanced
designswithabalanced-to-unbalancedconverter(usually IC op-amp based)
preceding the power amplifier. The 9505, however, is a true differential input
power amplifier.
Starting with the much acclaimed trans•nova amplifier core, each (+) and (–)
port of the input differential stage has been buffered with a high impedance
buffer pair. This allows direct signal access to the differential amplifier, with-
out conversion to unbalanced form. Deactivating the balanced mode is ac-
complished via a rear panel switch that grounds the (–) balanced inputs,
effectively converting the amplifier to unbalanced operation.
®
Series 9505
Power amplifier
True-balanced JFET input
MADE
USA
IN THE

SPECIFICATIONS
P9505
Power Rating..................................................................... 250 Watts/channel @ 8Ω
375 Watts/channel @ 4Ω
750 Watts bridged/mono @ 8Ω
Total Harmonic Distortion (THD) ................................................<0.2% (20Hz-20kHz)
Signal-to-Noise ..........................................................................100dB “A” Weighted
Full Power Bandwidth....................................................0.15Hz to 300kHz (+0/–3dB)
Slew Rate ....................................................................................................... 150V/µs
CMRR (Common Mode Rejection Ratio).............................................. 75dB at 1kHz
Input Impedance ........................................................... 47kΩper phase balanced
Gain ................................................................................................................. +29dB
Input Sensitivity Range ...................................800mV (@ 8Ω) per phase balanced
690mV (@ 4Ω) per phase balanced
Damping Factor....................................................................................1000 (to 1kHz)
100 (to 10kHz)
20 (to 100kHz)
Power Consumption........................................... 160W / 2.0A @ 120VAC (idle power)
370W / 4.2A @ 120VAC (1/8 power – 8Ω)
840W / 8.8A @ 120VAC (max. power – 8Ω)
Indicators ......................................................................................................... Power
Dimensions.................................................... 19”W x 121⁄2”D* x 51⁄4”H (3-rack spaces)
(48.3cm x 31.75cm x 13.3cm)
Net Weight......................................................................................... 50 lbs. (22.7kg)
*plus 1” for handles
Amplifier
9505
®
ARCHITECT’SAND ENGINEER’SSPECIFICATIONS
The audio power amplifier shall be a fully balanced, discrete solid state
designemployingJFET inputs and 16 lateralpowerMOSFEToutputdevices.It
shall be constructed on a 16 gauge steel chassis utilizing convection air
cooling.
Eachchannelshallberatedforaminimumof250wattsintoan8ohmloadand
375wattsintoa4 ohmloadwithboth channelsdriven.Inbridgedmonomode,
theamplifiershallproduceatleast750wattsintoan8ohmload.Aswitchshall
beprovided for stereo orbridged mono operation andall power ratings shall
be measured from 20Hz-20kHz with less than 0.2% THD.
Theamplifier’sbackpanelshallprovideaswitchtoselectUnbalancedinputs
via gold-plated RCA jacks or Balanced inputs via combination XLR and 1/4”
phone jacks. The back shall also utilize gold-plated 5-way binding posts for
outputconnectorsanda switch to isolate orconnectthesignalground to the
chassis ground. The amplifier shall include a 3-wire grounded AC line cord
and a switch to operate the UI power transformer on 120V/60Hz AC mains. An
optional transformer for 230V 50-60Hz operation shall be available.
The amplifier’s front panel shall incorporate a lighted main power switch and
have rack handles. The amplifier shall fit standard 19” EIA rack mounting
requirements utilizing 3-rack spaces. The dimensions shall be 19” Wide, 121⁄2”
Deep*(plus1”forhandles),51⁄4”High(excludingfeet),andbefinishedinblack
with a net weight of 50 pounds. It shall be a Hafler 9505.
*plus 1” for handles
CHANNEL 2
MONO OUTPUT: Use CH 1 Input Only.
CHANNEL 1
CH 2
120 VAC
60Hz
1800W MAX
Audio GND
Chass. Float
Phone Connections
CHANNEL 1
Mono 2 Ch
Unbal.
Bal.
A Division of Rockford Corp.
Tempe, AZ 85281 U.S.A.
Made in the U.S.A.
CH 1
(Mono)
+–
CHANNEL 2
4-8ΩCHANNEL 1
4-8Ω
PUSH PUSH
XLR Connections
3
21 +
–Mono
–+
®