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Zesto Audio Bia 200 Select Owner's Manual

Class a stereo power amplifier
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Bia 200 Select
Class A Stereo Power Amplifier
Owner's Manual
Please read carefully before
installing and operating this equipment
Zesto Audio
3138 Calle Estepa
Thousand Oaks, California 91360
805-807-1840
www.zestoaudio.com
george@zestoaudio.com
Made in the USA
Using US and Imported Parts
1 |
P a g e

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  • Page 1 Bia 200 Select Class A Stereo Power Amplifier Owner’s Manual Please read carefully before installing and operating this equipment Zesto Audio 3138 Calle Estepa Thousand Oaks, California 91360 805-807-1840 www.zestoaudio.com george@zestoaudio.com Made in the USA Using US and Imported Parts...

  • Page 2: Thank You

    Dear Music Lover, I wanted to personally thank you for your purchase of my Bia 200 Select Stereo Power Amp. I have loved music all my life – as a musician, record producer and audio engineer. That makes me fussy about sound. That’s a good thing.

  • Page 3: Table Of Contents

    15 & 16 Safety Tips- fuses………………………………. 17 Trouble shooting………………………………. 18 Warranty Information………………………. What’s in the box Bia 200 Select Stereo Power Amp 4 KT150 Vacuum Tubes 4 ECC82 (12AU7) Vacuum Tubes White glove for handling tubes IEC power cable 6’...

  • Page 4: Warning And Caution

    Do not spill liquid of any kind on the unit. If water or any metal object (such as a paper clip, coin, or staple) accidentally falls inside the unit, disconnect it from the AC power source immediately and contact Zesto Audio for further instructions.
  • Page 5 17. IMPORTANT SAFETY NOTE: • Before connecting a new product such as the Bia 200 Select to your audio or home theater system, turn off all other equipment (preferably unplugging them from the AC power source).
  • Page 6 19. FCC INFORMATION FOR USER: • CAUTION: Any changes or modifications not expressly approved by Zesto Audio could void the user's authority to operate the equipment. • These limits are designed to provide reasonable protection against harmful interference in a residential installation.

  • Page 7: Front And Rear Controls

    Front & Rear Panel Inputs, Outputs and Controls Front panel (not shown)  Power on/off switch: Turns the unit ON/OFF (located on front panel).  Front panel LED lights: Green indicates high voltage; Amber indicates low voltage (Both lights will remain on when unit is in use) Rear panel ...

  • Page 8: Specifications

    Specifications (based on KT150 tubes) Output  Class A  KT150 = 100 Watts per channel into 8 Ohms  4 Ohm, 8 Ohm and 16 Ohm output taps  10A, 7A and 5 Amp 6mm x 32mm Slow-blow speaker fuses for outputs ...
  • Page 9 Detailed Specs  Dual Mono  Auto bias  No negative feedback  Frequency response 20Hz to 30Khz ~ 3dB  Total Harmonic Distortion ~ 0.22% at 1W into 8 Ohms  Gain of 24dB  Noise level > 2mV -RMS into 8 Ohms with input shorted ...

  • Page 10: Set Up-Placement, Cables

    Placement Warning! You can damage this amplifier by not providing adequate ventilation on all 6 sides and at least 12” above the unit. It is not recommended to install this BIA 200 Select in an enclosed rack. Tip! Placement near other components such as network routers, satellite TV boxes, table or floor lamps can be a notorious source of hum or clicking noise in your system.

  • Page 11: Power

    It is not recommended to use any AC 2 to 3 pin adapter (cheater plug) with this power amp. For your safety Zesto Audio provides 2 ground switches that float the ground when using XLR cables. If you get a hum, start with the ground switch off, then independently flip the switches for the least amount of noise.
  • Page 12 Any damage caused by tube rolling is not covered by the manufacturer’s  warranty. This Bia 200 Select ships with a matched quad of KT150’s and four 12AU7  Only KT150 and 12AU7/ECC82 supplied by Zesto Audio are covered under the ...
  • Page 13 Tip: The logo on the metal collar and the alignment key on the tube faces forward.  For your safety, all Zesto Audio power amps ship with a copper plug inserted in the pin 6 socket to avoid any accidents. The good news is your power amp can be repaired at the factory or authorized service technician.

  • Page 14: Bias Select Switch

     The Maximum output for a KT150 & KT170 is the Right position but can also be used in the lower powered Left & Middle positions. Enjoy!  Only the KT150 and 12AU7/ECC82 supplied by Zesto Audio are covered under the 6 month manufacturer’s warranty. All other tubes are purchased separately and are the responsibility of the owner.

  • Page 15: How To Use - Grounding & Turn On

    How to use the Bias Select switch  This switch gives you the option to customize your system.  Each setting not only changes the power but also changes the sound.  This feature is designed to be easy to use. You can change the bias on the “FLY” while the unit is on, so you can hear the difference.
  • Page 16 Tip! Burn-in For the best performance, this Vacuum Tube Amplifier can take 200 hours to break in. For circuit testing and quality assurance, Zesto Audio ships all the Bia 200 Select Amps with at least 50 hours of factory burn-in.

  • Page 17: Safety Tips- Fuses

    Safety Tips Fuses: There are many safety features built into a Zesto power amp. The purpose of a fuse is to protect the amplifier, sometimes they wear out and sometimes the fuse will blow. The mains fuse is the most likely fuse to blow. ...

  • Page 18: Trouble Shooting

     If you change cables or move the amp, always double check that your power cable is properly inserted. A loose power connection can blow a fuse and possibly damage this amplifier.  If you break a tube, turn unit off immediately. Wait at least 1 hour for the high voltage to discharge completely to replace it.

  • Page 19: Warranty Information

    Warranty All Zesto Audio equipment is covered by a 2 year limited warranty for parts and labor to cover defects in materials and workmanship and 6 month warranty on the original vacuum tubes from date of purchase. Only KT150 and 12AU7/ECC82 supplied by Zesto Audio are covered under the 6 month warranty.

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