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Summary of Contents for Grimm Audio PW1
- Page 1 Phono preamps are notoriously difficult to design. Experience inspired an attitude of minimalist elegancy. PW1: a true Phono Wizard. Please read this manual before operating the Please read this manual before operating the unit. unit.
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Page 2: Table Of Contents
Table of Contents 1. Introduction 2. Important Safety Instructions 3. Installing 4. Operation and System Setup 5. Specifications 6. Grimm Audio Limited Warranty Manual PW1 © Grimm Audio... -
Page 3: Introduction
The Grimm Audio Team less than 90 dB amplification! info@grimmaudio.com For the PW1, Peter managed to develop a solid state phono preamplifier that matches his best tube based designs. Peter believes that designing a good phono Manual PW1 © Grimm Audio... -
Page 4: Important Safety Instructions
Grimm Audio gaat er van uit dat u deze Engelstalige tekst Read these instructions. volledig begrijpt. Als u hier moeite mee heeft dient u contact op te nemen met Grimm Audio. Op verzoek sturen wij u een Keep these instructions. vertaling toe. - Page 5 13. Install in accordance with the manufacturer’s moisture. instructions. 14. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Avoid exposure to direct sunlight. Manual PW1 © Grimm Audio...
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Page 6: Installing
AC Power Hookup Your PW1 was carefully packed at the factory and the The PW1 has a built-in linear power supply that is preset packaging it came in was designed to protect it from the to a 50 or 60 Hz AC mains voltage of either 100/115 V or trials and tribulations of shipping. - Page 7 Class 2 ‘double isolation’ levels. Audio connections On the rear of the PW1 all audio connections can be made. Top left you find the PW1 outputs on XLR and RCA (choose one pair). Bottom left are the Moving Coil (MC) RCA inputs, bottom right are the Moving Magnet (MM) RCA inputs.
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Page 8: Operation And System Setup
Before you plan serious listening, we recommend to instructions for all three types. switch your PW1 on and leave it on for at least 24 hours, to allow internal components to settle. The total break- All settings of the PW1 are accessible via a sliding panel in period to unlock the PW1’s full potential will be... - Page 9 50000 times smaller! This requires tremendous cartridge's output is set at 5 cm/sec cutting speed. Much agility from your phono preamp, and your PW1 is up to higher speeds should be anticipated while designing a phono preamp since peak groove excursions close to...
- Page 10 Block diagram Selectable Selectable MC RCA input MC load MC gain Selectable MC or MM MM RCA input MM load (switch) Selectable RIAAcorrection RCAoutput Boost gain XLR output Manual PW1 © Grimm Audio Manual PW1 © Grimm Audio...
- Page 11 (very few MMs break this law). This is the base load in We start with explaining how to set up for a MM (Moving the PW1. It is paralleled at the MM input with an rf- Magnet) cartridge, since that is a relatively simple case.
- Page 12 However, too much capacitance will cause unwanted please feel free to experiment if you find your cartridge peaking. sounding a little dull or a bit too bright. In the picture above you can see the influence of capacitive loading. Manual PW1 © Grimm Audio...
- Page 13 MCs, but in varies from 0.8 to 2 mV (@ 3.54 cm/s). As the name says most cases the PW1's overload margins will be wide (“Moving Coil”), the coil is now the moving element. It enough to cope with such extremes.
- Page 14 (both of the L and R more free, less restrained. Listen for yourselves is all we channels). The standard 330 pF plus the 680 pF will add can say..Manual PW1 © Grimm Audio Manual PW1 © Grimm Audio...
- Page 15 (note: never set both switches in the 'on' PW1’s output stage in spite of its +22 dBu (= 10 Vrms!) position). The final gain then amounts to a whopping 77 max output capability.
- Page 16 Set 680 pF switch Boost 0 dB +10 dB 0 dB MC gain (Not applicable) (Not applicable) Set +20 dB switch Recommended default settings for the three major types of cartridges, as a starting point. Manual PW1 © Grimm Audio...
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Page 17: Specifications
Output impedance: 100 Ω (RCA and XLR). • Channel imbalance: ≤ 0.5 dB. • Recommended output load impedance: > 10 kΩ. • Crosstalk: MM ≥ 90 dB (1 kHz, 5 mV); MC ≥ 86 dB (1 kHz, 500 µV). Manual PW1 © Grimm Audio... -
Page 18: Grimm Audio Limited Warranty
All period of two (2) years for parts and for a period of two authorized returns must be sent to Grimm Audio or an (2) years for labor from the date of original purchase. - Page 19 In no event will Grimm Audio be liable for incidental, © 2024, Grimm Audio BV. All rights reserved consequential, indirect or other damages resulting from the breach of any express or implied warranty, Grimm Audio PW1 hardware manual v1.0.1, 13-12-24...
- Page 20 Grimm Audio BV The Netherlands +31 40 213 1562 info@grimmaudio.com www.grimmaudio.com...
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