Tholin-Audio PA-1 Stereo Audio Tube Power Amplifier User Manual
- June 17, 2024
- Tholin-Audio
Table of Contents
PA-1 Stereo Audio
Tube Power Amplifier
User Manual and
Warranty Information
Thank you for purchasing a Tholin-Audio product!
www.tholin-audio.com
Tholin-Audio and the Tholin-Audio logo are registered trademarks of Tholin Limited. ©2022 Tholin Limited, 1512, 15F Lucky CTR, 165-171 Wan Chai Rd, Wan Chai, Hong Kong, 999077
Important Safety Instructions
- Read and follow these instructions and keep them.
- Operate the device only with connected speakers (with at least 4Ohm impedance)
- Never cover the device.
- Keep children and animals away because the device can get extremely hot during operation.
- Do not use this device near water.
- Clean only with a dry cloth.
- Make sure that the ventilation openings are not blocked.
- Do not operate the device in the immediate vicinity of heat sources such as radiators, heat flaps, stoves that generate heat.
- Do not bypass the polarized or grounded plugs attached for safety reasons. A polarized plug has two contact pins, one of which is wider than the other. A grounded plug has two contact pins and a third grounded ground contact. The wider contact pin or Mass contact is for your safety. If the enclosed plug does not fit into your socket, please contact an electrician to replace your socket.
- Route the power cord so that no one runs over it and it cannot be bent by heavy objects. Pay particular attention to power plugs, extension sockets and the cable connection on the device.
- In case of thunderstorms or prolonged non-use, unplug the device from the socket.
- All maintenance work must be carried out by qualified specialists. Maintenance is necessary in the following cases: if the device has been damaged, if an electrical cable or plug has been damaged, if liquids have been spilled or an object has fallen into the device, if the device has stood in the rain or was exposed to moisture, does not function normally or has been dropped.
- Use the power plug to disconnect the device from the mains.
- WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, NEVER EXPOSE THE DEVICE TO RAIN OR MOISTURE!
- DO NOT EXPOSE THE DEVICE TO DRIPPING WATER OR SPLASHING WATER AND MAKE SURE THAT NO LIQUID-FILLED OBJECTS SUCH AS VASES ARE PLACED ON THE DEVICE.
- THE POWER PLUG OF THE POWER CORD MUST BE ACCESSIBLE AT ALL TIMES.
DO NOT OPEN THE HOUSING OF THE DEVICE: RISK OF ELECTRIC SHOCK! THE COMPONENTS
INSIDE THE DEVICE CANNOT BE MAINTAINED BY THE USER. ALL MAINTENANCE WORK MUST
BE CARRIED OUT BY QUALIFIED SPECIALISTS.
TO COMPLETELY DISCONNECT THIS DEVICE FROM THE MAINS, UNPLUG THE POWER CORD
FROM THE POWER OUTLET. THE POWER PLUG OF THE POWER CORD MUST BE ACCESSIBLE AT
ALL TIMES.
Welcome
Thank you for purchasing the PA-1 stereo tube power amplifier!
Features
- High-End vacuum tube stereo music power amplifier with 2 x 10 Watt
- Heavy and durable dual monoblock design
- Single ended class-A amplifier design
- Utilizing 300B vacuum tubes
- Illuminated VU/power output meter
- Dust proof ALPS volume knob
- Filament voltage control knob
- CLC filter circuit
- Large, solid gold-plated loudspeaker terminals
- Gold-plated RCA line level input
Technical Data
- Output power: 2 x 10-Watt on 8 Ohm
- Amplifier design: Class-A
- Load impedance: 4 – 8 Ohm
- Total harmonic distortion: <0.06%
- Frequency Response: 20 Hz – 30 kHz
- Input sensitivity: 500 – 2000mV
- Signal to noise ratio (SNR): -98dB
- Input impedance (RCA/Chinch): 100 kOhm
- Power consumption: 50-100 Watt (per channel)
- Input voltage: AC 220/230 V
- Net weight: 24kg (pair)
- Dimensions: 352 x 102 x 250 (h) mm
The Front
The Back
Commissioning
If you’re not sure how to commission / setup the amplifier please visit us at
www.tholin-audio.com or contact us by Email to
[email protected].
Note: To ensure the amplifier vacuum tubes are not damaged during
transport, they must be installed and connected after receipt of the amplifier
by the customer.
How do I set up the amplifier after receiving it?
-
Unpack the device and place it on a flat surface
-
Install the vacuum tubes in their sockets. Please proceed carefully and ideally wear gloves during installation to avoid dirt or oil/fat swabs
• 6sn7 vacuum tubes in the front sockets (8 contacts)
• 300B vacuum tubes in the middle sockets (4 contacts)
• 5u4c vacuum tubes in the rear sockets (4 or 7 contacts)
-
Connect the speakers to the speaker terminals
-
Connect a line level device (e.g., audio preamplifier) to the RCA / line level inputs
-
Connect the power cord (if needed, adjust the device voltage)
-
Turn down the volume knob
-
Turn on the amplifier
-
Adjust the filament voltage on the back of the device to reduce possible noise/hum to an absolute minimum
-
Start playback on your audio source and slowly turn up the volume to the desired level
Customer Service (Germany)
In case of questions or problems, please contact us through the contact form on our website www.tholin-audio.com or by e-mail to [email protected]
Service Center address:
Tholin Limited / Service
Werdener Str. 51
42551 Velbert, Germany
Warranty and Disclaimer
SUMMARY OF WARRANTY*
Tholin Limited warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT
OWNER of each NEW Tholin-Audio product, for a period of one (1) year from the
date of purchase by the original purchaser (the “warranty period”) that the
new Tholin-Audio product is free of defects in materials and workmanship. We
further warrant the new Tholin-Audio product regardless of the reason for
failure, except as excluded in this Warranty.
ITEMS EXCLUDED FROM THIS Tholin-Audio WARRANTY
This Tholin-Audio Warranty is in effect only for failure of a new Tholin-Audio
product which occurred within the Warranty Period. It does not cover any
product which has been damaged because of any intentional misuse, accident,
negligence, or loss which is covered under any of your insurance contracts.
This Tholin-Audio Warranty also does not extend to the new Tholin-Audio
product if the serial number has been defaced, altered, or removed.
WHAT THE WARRANTOR WILL DO
We will remedy any defect, regardless of the reason for failure (except as
excluded), by repair, replacement, or refund. We may not elect refund unless
you agree, or unless we are unable to provide replacement, and repair is not
practical or cannot be timely made. If a refund is elected, then you must make
the defective or malfunctioning product available to us free and clear of all
liens or other encumbrances. The refund will be equal to the actual purchase
price, not including interest, insurance, closing costs, and other finance
charges less a reasonable depreciation on the product from the date of
original purchase. Warranty work can only be performed at our authorized
service centers or at the factory. We will remedy the defect and ship the
product from the service center or our factory within a reasonable time after
receipt of the defective product at our authorized service center or our
factory. All expenses in remedying the defect, including surface shipping
costs in Germany, will be borne by us. (You must bear the expense of shipping
the product between any foreign country and the port of entry in Germany
including the return shipment, and all taxes, duties, and other customs fees
for such foreign shipments.)
HOW TO OBTAIN WARRANTY SERVICE
You must notify us of your need for warranty service within the warranty
period. All components must be shipped in a factory pack, which, if needed,
may be obtained from us free of charge. Corrective action will be taken within
a reasonable time of the date of receipt of the defective product by us or our
authorized service center. If the repairs made by us or our authorized service
center are not satisfactory, notify us or our authorized service center
immediately.
DISCLAIMER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES
YOU ARE NOT ENTITLED TO RECOVER FROM US ANY INCIDENTAL DAMAGES RESULTING FROM
ANY DEFECT IN THE NEW THOLIN-AUDIO PRODUCT. THIS INCLUDES ANY DAMAGE TO
ANOTHER PRODUCT OR PRODUCTS RESULTING FROM SUCH A DEFECT. SOME STATES DO NOT
ALLOW THE EXCLUSION OR LIMITATIONS OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO
THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
WARRANTY ALTERATIONS
No person has the authority to enlarge, amend, or modify this Tholin-Audio
Warranty. This Tholin-Audio Warranty is not extended by the length of time
which you are deprived of the use of the new Tholin-Audio product. Repairs and
replacement parts provided under the terms of this Tholin-Audio Warranty shall
carry only the unexpired portion of this Tholin-Audio Warranty.
DESIGN CHANGES
We reserve the right to change the design of any product from time to time
without notice and with no obligation to make corresponding changes in
products previously manufactured.
LEGAL REMEDIES OF PURCHASER
THIS THOLIN-AUDIO WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, YOU MAY ALSO HAVE
OTHER RIGHTS WHICH VARY FROM STATE TO STATE. No action to enforce this Tholin-
Audio Warranty shall be commenced after expiration of the warranty period.
THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS CONTAINED IN THIS MANUAL FOR
THOLIN-AUDIO PRODUCTS
*The warranty period for amplifier vacuum tubes is limited to three (3) months upon the date of purchase.
DISCLAIMER OF LIABILITY
WITH THE PURCHASE OF THOLIN LIMITED’S PRODUCT OR SERVICE YOU ARE ACCEPTING THE
HERE OUTLINED DISCLAIMER OF LIABILITY.
TO THE EXTENT NOT PROHIBITED BY APPLICABLE LAW, IN NO EVENT WILL THOLIN
LIMITED (RESPECTIVELY THE REGISTERED BRAND THOLIN-AUDIO) BE LIABLE FOR
PERSONAL INJURY, OR ANY INCIDENTAL, SPECIAL, INDIRECT, CONSEQUENTIAL OR
PUNITIVE DAMAGES WHATSOEVER, INCLUDING, WITHOUT LIMITATION, DAMAGES RESULTING
FROM WRONG USAGE, DELAY OF DELIVERY, FOR LOSS OF PROFITS, BUSINESS OR
GOODWILL, FOR BUSINESS INTERRUPTION OR ANY OTHER COMMERCIAL DAMAGES OR LOSSES,
ARISING OUT OF OR RELATED TO THIS AGREEMENT OR YOUR USE OR INABILITY TO USE
THE PRODUCT OR SERVICE PURCHASED FROM THOLIN LIMITED OR ITS AFFILIATES,
HOWEVER CAUSED, WHETHER UNDER A THEORY OF CONTRACT, WARRANTY, TORT (ALSO
NEGLIGENCE), PRODUCTS LIABILITY, OR OTHERWISE, EVEN IF THOLIN LIMITED HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND NOTWITHSTANDING THE FAILURE OF
ESSENTIAL PURPOSE OF ANY REMEDY. IN NO EVENT SHALL THOLIN LIMITED’S TOTAL
LIABILITY TO YOU UNDER THIS AGREEMENT FOR ALL DAMAGES (OTHER THAN AS MAY BE
REQUIRED BY APPLICABLE LAW) EXCEED THE AMOUNT OF FIFTY EUROS (EUR 50.00).
Tholin-Audio®