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Welcome to my DIY audio forum. The forum SW has been reset and unfortunately there were some problems with backup files so a few posts were lost, nothing important though.

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Per-Anders Sjöström

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Headphone amplifiers

QRV-02, QRV-03, QRV04, QRV-08 and QRV-09 Headphone amplifiers

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QRV08 Setup Instructions

Started by BMF

Pages1 2 3 4 5 6 7

Replies: 97
Views: 46,813

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

Replies: 71
Views: 48,553

August 24, 2012, 06:16:42 PM
by galouche

QRV-08 hum

Started by CapRock

Pages1 2 3 4 5

Replies: 63
Views: 38,182

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

QRV-08 power up

Started by svarthvitt

Pages1 2 3

Replies: 43
Views: 29,325

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

QRV-02 support JIN

Started by peranders

Pages1 2

Replies: 21
Views: 15,678

May 04, 2006, 11:42:29 PM
by peranders

QRV01 output stage

Started by goldkenn

Pages1 2

Replies: 19
Views: 13,657

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

Power supply for QRV07

Started by renlute

Pages1 2

Replies: 16
Views: 12,790

December 17, 2010, 05:52:55 PM
by peranders

Replies: 14
Views: 14,541

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

Replies: 13
Views: 8,885

March 19, 2015, 10:55:57 PM
by maust

Replies: 11
Views: 9,162

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

Replies: 10
Views: 5,237

January 12, 2025, 08:40:08 PM
by peranders

Replies: 10
Views: 8,265

April 26, 2017, 04:32:13 PM
by chinook9

Replies: 9
Views: 8,915

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

Replies: 9
Views: 7,349

February 16, 2010, 11:56:59 AM
by qusp

Replies: 9
Views: 7,361

May 05, 2018, 01:27:58 PM
by peranders

Replies: 9
Views: 11,183

June 02, 2006, 10:48:29 AM
by peranders

Replies: 8
Views: 9,216

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

Replies: 8
Views: 8,478

May 09, 2016, 02:29:55 PM
by savinalexandru

QRV-08 Build #3

Started by BMF

Replies: 7
Views: 7,240

January 11, 2017, 12:25:18 AM
by BMF

Replies: 7
Views: 8,243

May 04, 2012, 08:43:10 PM
by peranders

Replies: 7
Views: 6,482

March 17, 2010, 06:06:32 PM
by peranders

Replies: 7
Views: 6,964

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

Replies: 7
Views: 8,189

June 12, 2015, 08:02:27 PM
by peranders

Replies: 6
Views: 6,672

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

QRV-07 DC problem

Started by alerma

Replies: 6
Views: 6,942

January 01, 2007, 10:16:32 AM
by alerma

Replies: 5
Views: 7,848

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

Replies: 5
Views: 7,103

July 23, 2007, 09:18:29 AM
by peranders

Replies: 5
Views: 6,944

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

QRV09 Voltage

Started by Forte

Replies: 4
Views: 6,065

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

Replies: 4
Views: 5,940

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

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