PopPulse T150 Class-T Stereo Amplifier

USER GUIDE

1. Introduction Congratulations on purchasing a PopPulse t150 Class-T stereo amplifier. Thanks to it utilising advanced Tripath technology & audiophile grade parts, the t150 is able to easily achieve the sonic performance of traditional high-end amplifiers, but in a compact, affordable and efficient little unit. Based around the Tripath 2022 IC, this amplifier is much more powerful, dynamic and musical than most other t-amps that commonly use the 2024 IC. With a power output of up to 77 Watts RMS per channel, the t150 has sufficient power to drive most hifi speakers with total authority.

2. Features

• Uses Tripath technology for audiophile quality sound

• Up to 90% efficient. Hardly generates any heat!

• No start-up pop!

• Audio grade parts used throughout including an Alps RK27 volume pot and Elna capacitors.

• Powered directly from the mains via it’s oversized internal toroidal transformer.

• Volume control can be bypassed via an internal jumper (for use with a pre-amplifier)

• Monoblock bridgeable for up to 150 Watts RMS output through setting an internal jumper (stereo use requires two identical T150 amps).

• XLR mono input (for use when using two bridged t150’s as monoblocks)

• Over-current protection

• Thermal protection

• Uses Audiophile parts and components

• Housed in a top quality metal case with a very classy, thick aluminium front facia plate. Provides excellent shielding from electronic interference.

Technically the XLR input is stereo but not true balanced. Think of it as a mono

XLR input for when two t150 amps are setup in bridged mode as monoblocks.. 3. Overview

4. Getting Started Guide

• Carefully unpack amplifier

• Observing correct polarity, attach left and right speakers to the left and right speaker terminals. The use of banana plugs (not supplied) is highly recommended and makes hooking up speakers very easy.

• Plug audio source into the left and right RCA sockets (don’t switch on audio source yet)

• Plug the supplied AC power lead into the IEC power socket on the rear of amp (do not turn mains power on just yet)

• Make sure that the volume control is turned down fully.

• Switch on the mains power and using the power switch on the amplifier back panel, turn on the amplifier. The blue power LED on front of amplifier should light up.

• Play audio source

• Turn up volume to a suitable level

• Enjoy!

5. Accessories Comes complete with:

• UK IEC mains power lead

• User Guide (will email a .pdf copy)

6. Specifications T-Amp IC Tripath 2022 Output Power Up to 77 Watts RMS per channel into 4 ohm Signal-to-Noise Ratio (SNR) 98dB THD+Noise THD: 0.05% (1 KHz)

Power Efficiency Up to 90% Input RCA inputs (Left/Right), XLR input ,

IEC mains power Socket Output Left and Right full size speaker terminals (also take banana plugs) Switches & Knobs Power ON/OFF switch (on rear panel)

Blue LED power indicator, volume knob Volume Knob

Power Supply 220-240v

Dimensions 16cm Wide, 6cm Deep, 25cm Length

Weight 4.5kg 7. Troubleshooting Checklist

• Make sure AC power lead is plugged into mains. The other end should be plugged into the IEC socket on rear of amplifier. Switch on mains.

• Make sure amplifier is switched on.

• Make sure music is playing and the volume is not turned totally down.

• If volume control is not working, make sure that the internal jumper is not set up to bypass the volume control.

• If volume knob is grinding and rough to turn, gently pull volume knob forward slightly to restore smooth operation.

ADVANCED USERS ONLY!! 8. How to bypass volume control (for use with a pre-amp) Recommended Tools

• A good Philips head screwdriver. • A pair of tweezers or needle nosed pliers. • Make sure AC power lead is unplugged!!

• Using screwdriver, Gently remove the 5 case screws and slide the top casing towards the rear of amplifier until removed.

Default factory setting (“integrated” amplifier mode)

The black wires (attached to a molex header) need to be gently unplugged from the main board as below

Gently unplug the audio signal wires (also attached to a molex header) from the underside of the volume control PCB circuit.

Gently plug the audio signal wires into the main PCB.

Volume control is now bypassed! ADVANCED USERS ONLY!! 9. Bridged mode (converts amplifier to a monoblock). Recommended Tools

• A good Philips head screwdriver. • A pair of tweezers or needle nosed pliers

For stereo bridged operation, 2x t150 amplifiers will have to be used and setup in a similar way. The picture below is how to set the jumper to operate the t150 in bridged mode with the volume bypassed.

This will be the most useful mode for those wishing to use a pair of t150s as monoblocks.

A pre-amp or sound source with variable output level is needed to control volume levels when amps are setup in this mode. If the user wants to setup two t150s in bridged mode but does not want the volume controls bypassed, the configuration is the same as the default setting (first picture) except that the jumper is set across 2-3. Inputs and Outputs to use whilst t150 is operating in bridged mode

The mono XLR input could also be used instead of the RCA input PopPulse has not written this User Manual. It’s the work of:

www.luckyfrogaudio.co.uk