Suhr PT-15 I.R. User manual

User Guide

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Table of Contents
Overview........................................................................................................ 3
IMPORTANT SAFETY INSTRUCTIONS....................................................... 4
Front Panel Overview.....................................................................................5
Rear Panel Overview......................................................................................6
Channel 1 (Clean)......................................................................................... 7
Channel 2 & 3 (High-Gain)............................................................................ 8
Presence & Master Volume........................................................................... 9
Speaker Outputs..........................................................................................10
Speaker Output Use Cases......................................................................... 11
Line Output.................................................................................................. 12
FX Loop & Footswitch..................................................................................13
Impulse Response Section & Channel Select Button..................................14
Managing Impulse Responses with a Computer..........................................15
Headphone Out & Aux in Section................................................................ 16
How to Silently Practice with Headphones.................................................. 17
How to Connect to a DAW (Digital Audio Workstation)................................18
Live Set-Up With Stage Volume...................................................................19
Tubes, Fuses & Power Requirements......................................................... 20
Impulse Responses Included With PT-15 I.R.............................................. 21
Technical Specications............................................................................... 22
Warranty.......................................................................................................22

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Overview
The PT-15 is the latest innovation to come from Suhr. Three of the foremost
authorities on tone, John Suhr, his son Kevin Suhr and the legendary guitar
player and recording artist Pete Thorn have collaborated once again to
design a new, groundbreaking version of his revolutionary PT-100.
The PT-15 is a brand new evolution of the PT signature amp in a smaller,
lighter and lower wattage package. The 3 channels of tone arrived
after decades of research and development Pete and John conducted over
the years, yet with the expanded versatility of an on-board Reactive Load
I.R. AND impulse response loader, bundled with IRs from Celestion along
with seven proprietary IR blends made by Pete Thorn himself.
Now, the PT amplier has evolved once again to combine the best of the
analog and digital worlds, leveraging both to their fullest extent to create this
bar-raising amplier. Classic tube circuitry generating dynamics, overdrive,
saturation and harmonics while digital technology and using impulse re-
sponses to capture the highly complex frequency response which results in
the nuances of the sonic character of a speaker and its relationship to a mic.
This simply can not be replicated with an analog circuit. With the awesome
capability of a programmable IR for each channel that will automatically
switch to your selected IR when you switch your channels, you can use the
power of impulse responses to vastly alter the tone of your signal.
This makes the PT-15 I.R. the MOST versatile amplier produced today,
analog and digital with absolutely no compromises.
Thank you for purchasing the Suhr PT-15 I.R.™
Please take the time to read this User Guide to get the most out of the
PT-15 I.R. The more you familiarize yourself with the features of this unit, the
more you will enjoy its benets and maximize its potential.

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1. Read these instructions
2. Keep these instructions
3. Heed all warnings
4. Follow all instructions
5. Clean only with dry cloth
6. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
7. Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including ampliers) that produce heat.
8. Protect the power cord from being walked on or pinched particularly at
plugs and the point where they exit from the apparatus.
9. Only use attachments/accessories specied by the manufacturer.
10. Unplug this apparatus during lightning storms or when unused for long
periods of time.
11. Refer all servicing to qualied 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 rain or moisture, does not operate normally, or has been
dropped.
12. CAUTION: To disconnect the unit completely from the MAINS, unplug
the unit. Turning the power switch off does not disconnect the unit
completely from the MAINS.
13. The unit shall not be exposed to dripping or splashing and that no
objects lled with liquids, such as vases, shall be placed on the unit.
14. WARNING: This is a Class I apparatus. It should be connected to a
MAINS socket outlet with a protective earthing connection.
IMPORTANT SAFETY INSTRUCTIONS

Adjusts the level of I.R. affected
signal coming through the
headphone out.
I.R. Level (H.P. Level)
Aux In
Bank & Cab Select buttons & LED
Headphone Out
Channel Select button
Master Volume knob
Master Presence knob
Input
Channel 1 (Green) Channel 2 (Blue) & 3 (Red)
Power (On/Off)
Stand By (On/Off)
1/8’' Stereo Auxiliary Input for
connecting smart-phone or other
audio device.
1/8’' Stereo Headphone output
for easy monitoring or practice.
Use this to connect your guitar.
Adjusts the amount of high frequencies.
Turning it clockwise will add more high
end and sparkle.
Adjusts overall volume.
High Gain Channels
Seperate Gain, Level and Bright
Switch per channel and shared
Bass, Middle and Treble controls.
Clean channel with Gain, Level,
Bass, Treble controls and Bright
Switch.
Press to cycle between the
amps three channels.
These buttons allow you to switch between
banks 1-4. Each bank has 4 cabs for a total
of 16 I.R.s.
I.R. Channel link
To link any I.R. to a specic channel for instant
recall, select channel and desired I.R., then hold
the 'Bank Select Button' and 'Cab Select Button'
for one second. To reset all channels, hold Bank,
Cab and Channel select button for 3 seconds.

Speaker Output (Black ring)
(Reactive Load Enabled in Parallel)
Line Output
Foot Switch
USB In
Fx Loop Send
H.T. Fuse
Mains Fuse
Mains Input
Fx Loop Return
Speaker Output (RED ring)
(Reactive Load Disabled)
Impedance Selector
Connect this output to the input of
your effects device or chain.
Connect this input to the output of
your device or chain.
F.5 Amp/240V (Fast-Blo)
T1.5A/250V (Slo-Blo) - 100/120VAC
T.75A/250V (Slo-Blo) - 230/240VAC
Connect the supplied AC cable
to this inlet to supply power.
Set this switch to match the impedance of the
cabinet(s) being used. When no speaker
cabniet is connected, set impedance selector
to 8Ω to match the internal reactive load.
When using this jack you MUST
have a load (Cabinet) connected,
This jack delivers full power and
volume to your cabinet.
When using this jack the reactive
load is enabled in parallel with your
cabinet, reducing overall volume by
-3dB SPL. (equivalent to half power)
See page 10 for more details
I.R. Bypass
Use this as a direct line level out
from your amp for easy recording
and live applications.
Connect to a computer to
manage the installed impulse
response les.
Press to bypass the I.R. lter i.e.
no impulse response affecting the
tone.
Connect the supplied foot switch
here via stereo cable (TRS).

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Channel 1 (Clean)
Things to know:
1. GAIN - Adjusts the overall gain of channel 1.
2. LEVEL - Adjusts the overall output of channel 1.
3. BASS - Adjusts the amount of bass. Turning it clockwise increases the
amount of bottom-end, giving you a fuller, richer tone, without losing
denition. Turning it counter clockwise will reduce the bottom-end for a tighter
tone, which is useful when performing at louder volumes.
4. TREBLE - Adjusts the treble. Turning it clockwise increases the amount of
top-end, giving your tone clarity and brightness. Turning it counter
clockwise will produce a warmer sound, ideal for dialing in smoother Jazz-like
tones.
5. BRIGHT SWITCH -Introduces added brightness and sparkle that brings out
a chimy organic top end.
The PT15 I.R. has a clean channel in a league of its own.
American voiced, bold, clear, punchy responsive tone with tons of
headroom.
☺HELPFUL TIP: Although channel 1 has no midrange control, the bass
and treble settings will interactively affect this channel’s midrange
response. Turning up the bass and treble will effectively scoop the mids.
Turning down the bass and treble will push the midrange front and center.

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Channel 2 & 3 (High-Gain)
Things to know:
1. GAIN - Adjusts the overall gain of channel 2 or channel 3.
2. LEVEL - Adjusts the overall output of channel 2 or channel 3.
3. BASS - Adjusts the amount of bass. Turning it clockwise increases the
amount of bottom-end, giving you a fuller tone. Turning it counter clockwise
will reduce the bottom-end, which is useful when performing at louder
volumes.
4. MIDDLE - Adjusts the midrange. Turning it clockwise increases the amount of
mids. Turning it counter clockwise will reduce the mids and produce a
mid-scooped sound.
5. TREBLE - Adjusts the treble. Turning it clockwise increases the amount of
top-end, giving your tone clarity and brightness. Turning it counter clockwise
will produce a warmer sound, excellent for dialing in smooth uid-like lead
tones .
6. BRIGHT SWITCH -Adds brightness and sparkle.
The PT15 I.R. high gain channels are based on vintage modded British
tones, except more gain to spare. These channels shine at all settings, from
crunch to searing metal, low, mid and high gain, it's all there with rich
harmonic overtones and limitless sustain.

9
Presence & Master Volume
Things to know:
1. MASTER - Adjusts the overall volume output of all channels.
2. PRESENCE - Adjusts the amount of high frequencies added to your tone.
Turning it clockwise will add more sparkle.
The Presence & Master Volume controls of the PT-15 I.R. affect all of the
channels.

Speaker Outputs
The built-in 8Ω reactive load is always enabled UNLESS a speaker cabinet is
connected to the Reactive Load Disconnect (red ring jack) output. This
speaker output disables the internal reactive load.
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Speakers Outputs:
Reactive Load In Parallel:
When using this jack the reactive load is enabled in parallel with your cabinet,
reducing overall volume by -3dB SPL (equivalent to half power)
Reactive Load Disabled:
When using this jack you MUST have a load (Cabinet) connected.
Using this speaker output disables the internal reactive load, delivering full power
and volume to your cabinet.
Impedance Selector:
The impedance must be set at all times to the total load on the amp. When the
internal Reactive Load is in use, it places an 8Ω load on the amp. If a cabinet is
used in parallel with the Reactive Load, the 8Ω internal load must be included in
the impedance calculation.
If playing through a speaker cab with the RL disabled, set the impedance to
match the connected cab(s).
One 16 Ω cabinet, set impedance selector to 16 Ω
One 8 Ω cabinet, set impedance selector to 8 Ω
One 4 Ω cabinet, set impedance selector to 4 Ω
If you plug two cabinets in to both speaker out, you must set the impedance
selector to the total load (impedance) of both cabinets being used.
Remember, if you are using both speaker outs the reactive load will be disabled.
However, the Line Out will still be active.
Two 16 ohm cabinets = 8 ohm total load
Two 8 ohm cabinets = 4 ohm total load.
(Using two 4 ohm cabinets simultaneously is not recommended)
!