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EROS 500 Select
Class A Monaural 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
Zesto Audio EROS 500 Select
2022
1 |
P a g e
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Table of Contents
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Summary of Contents for Zesto Audio EROS 500 Select
- Page 1 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 Zesto Audio EROS 500 Select 2022 P a g e...
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Page 2: Thank You
I am proud to put my name on it and honored to share this with you. Wishing you many happy years of listening! Sincerely, -- George Counnas, President of Zesto Audio FYI: Zesto is Greek for hot EROS is the God of Love and Desire in Greek mythology... -
Page 3: Table Of Contents
Operating, Grounding & Turn on………….. 16 & 17 Trouble shooting,………………………………. 17 & 18 Cleaning………………………………………… 18 Warranty Information…………………………. 19 What’s in the box: Eros 500 Select Monoblock Power Amp 6 KT150 Vacuum Tubes 2 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 Eros 500 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.
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Page 7: Front And Rear Controls
5-way binding posts with 4 Ohm and 8 Ohm taps with black common Output speaker fuses: Individual 10Amp and 7Amp 6mm x 32mm slow blow fuses for each output tap. Zesto Audio EROS 500 Select 2022 P a g e... -
Page 8: Specifications
XLR gold pin balanced input with pin 2 hot, impedance 12K Ohms RCA gold pin single ended input, impedance of 12K Ohms XLR ground lift switch 3.3 Volts RMS input to reach rated output Zesto Audio EROS 500 Select 2022 P a g e... - Page 9 Shipping box 27" W X 27" D X 13" H (68.5 cm x 68.5 cm x 33 cm) 16 and 14 gauge Zinc plated steel enclosure Two year limited warranty Six months warranty on 12AU7 Vacuum Tubes, 90 day warranty on KT150 power tubes Zesto Audio EROS 500 Select 2022 P a g e...
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Page 10: Set Up-Placement, Cables
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 the Eros 500 Select in an enclosed rack or directly on a carpet. -
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 a ground switch that floats the ground on the XLR inputs. The ground on the RCA is always floating. If you get a hum, start with the ground switch off, then independently flip the switch on each amplifier for the least amount of noise. -
Page 12: Tubes
Any damage caused by tube rolling is not covered by the manufacturer’s warranty. Each Eros 500 Select ships with a six of KT150’s and two 12AU7 Only KT150 and 12AU7/ECC82 supplied by Zesto Audio are covered under the warranty. - Page 13 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 if inserted incorrectly.
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Page 14: Bias Select Switch
Right Position: Rated at 250 Watts is the maximum power rating for KT150 & KT170. Only the KT150 and 12AU7/ECC82 supplied by Zesto Audio are covered under the manufacturer’s warranty. 90 days on the KT150s and 6 months on the 12AU7s. All other tubes are purchased separately and are the responsibility of the owner. - Page 15 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 Eros 500 Select Power Amps with at least 50 hours of factory burn-in.
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Page 16: Safety Tips, Fuses
If you break a tube, turn unit off immediately. Wait until both LEDs are off for the high voltage to discharge completely to replace it. If you spill any liquids on the unit, turn off immediately and call the factory. Zesto Audio EROS 500 Select 2022 16 |... -
Page 17: Trouble Shooting
If it is a weak tube, we recommend you replace in pairs, like V1 & V2, or V3 & V4, V5 & V6. Zesto Audio EROS 500 Select 2022... -
Page 18: Cleaning
Never spray any liquids directly onto the unit. Use a stainless steel cleaner sprayed onto a micro-cloth on the mirrored stainless steel curve. Use a separate super soft microfiber cloth and gently remove the residue. Zesto Audio EROS 500 Select 2022 18 |... -
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. There is a 6 month warranty on the original 12AU7 vacuum tubes from date of purchase and 90 days on the KT150. Only KT150 and 12AU7/ECC82 supplied by Zesto Audio are covered under the warranty.
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