Headphone amplifiers

QRV-08 hum

Started by CapRock

Pages1 2 3 4 5

Replies: 63
Views: 46,046

April 27, 2011, 08:23:05 PM
by peranders

QRV-08 OP Amp replacement

Started by alexanderbax

Replies: 4
Views: 7,812

January 31, 2017, 08:38:38 PM
by peranders

QRV-08 PANEL MOUNT POT

Started by CapRock

Replies: 7
Views: 8,349

January 20, 2011, 08:54:29 PM
by peranders

QRV-08 Parts Selection

Started by Houghtkj

Replies: 5
Views: 9,707

March 22, 2012, 07:57:26 PM
by peranders

QRV-08 Place to connect PWR LED

Started by chinook9

Replies: 4
Views: 8,905

March 20, 2019, 11:03:23 AM
by peranders

QRV-08 power up

Started by svarthvitt

Pages1 2 3

Replies: 43
Views: 38,499

June 13, 2019, 09:11:47 PM
by svarthvitt

QRV-08 setup questions

Started by mabu0815

Replies: 4
Views: 7,823

November 01, 2014, 05:09:57 PM
by Matthias

QRV-08 with 12V rails

Started by jezz

Replies: 11
Views: 10,583

January 17, 2015, 09:47:29 AM
by peranders

QRV-09 - rectifiern funkar sådär bakvänd

Started by maust

Replies: 2
Views: 7,587

March 21, 2015, 01:07:03 AM
by maust

QRV01 output stage

Started by goldkenn

Pages1 2

Replies: 19
Views: 14,891

August 30, 2010, 08:14:23 AM
by peranders

QRV03 questions

Started by peranders

Replies: 0
Views: 5,666

February 23, 2009, 09:10:59 PM
by peranders

QRV06 topologie for power amplifier

Started by Digora

Replies: 9
Views: 10,041

March 04, 2008, 12:35:03 PM
by peranders

QRV07 & QRV08 build costs

Started by nightanole

Replies: 14
Views: 16,066

August 08, 2010, 11:05:28 PM
by renlute

QRV08 - Humming sound from transformers

Started by mabu0815

Replies: 1
Views: 6,649

February 04, 2016, 07:01:18 PM
by peranders

QRV08 - IC4/5 and IC 8/9 LM431 must be populated?

Started by mabu0815

Replies: 2
Views: 6,922

October 16, 2015, 11:36:58 AM
by mabu0815

QRV08 output voltage offset and the servo

Started by Kingston

Replies: 8
Views: 11,326

December 06, 2013, 09:38:49 PM
by peranders

QRV08 Setup Instructions

Started by BMF

Pages1 2 3 4 5 6 7

Replies: 97
Views: 54,675

July 25, 2016, 05:28:38 AM
by BMF

QRV09

Started by csyao

Replies: 4
Views: 9,187

June 08, 2011, 04:31:51 AM
by csyao

QRV09 Capacitor wrong size

Started by jhmvanbeek

Replies: 5
Views: 8,856

March 02, 2014, 10:32:35 AM
by jhmvanbeek

QRV09 Voltage

Started by Forte

Replies: 4
Views: 7,738

November 24, 2014, 05:58:14 PM
by Forte

Questions about QRV01 QRV03 QRV08

Started by semola

Replies: 1
Views: 6,355

March 03, 2010, 03:34:43 PM
by peranders

Regarding QRV07

Started by goldkenn

Replies: 6
Views: 7,786

June 17, 2010, 08:44:50 PM
by peranders

Simple board for THS6012 (TPA6120)

Started by misterstarshine

Replies: 4
Views: 10,672

June 17, 2010, 08:45:15 PM
by peranders

Tobias' QRV-07 bygge

Started by peranders

Replies: 0
Views: 6,658

November 06, 2005, 08:23:19 AM
by peranders

Using QRV-08 as a Preamp

Started by chinook9

Replies: 2
Views: 7,659

July 24, 2018, 04:12:51 PM
by chinook9

Which fuse for QRV07

Started by Consystor

Replies: 1
Views: 7,147

July 24, 2011, 10:39:17 PM
by peranders

Which kit good to Balanced Headamp?

Started by palchiu

Replies: 3
Views: 6,518

November 21, 2010, 11:10:34 AM
by peranders

wich of the amps have better quality?

Started by samsagaz

Replies: 1
Views: 5,785

December 28, 2009, 04:57:57 AM
by peranders