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Out of Stock - Allows Pre-Orders

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  • MASS-Kobo Model 491

MASS-Kobo Model 491

Flagship Desktop Balanced Headphone Amplifier

  • Twin-balanced monoblock design with independent left and right power supplies
  • Balanced outputs: over 3.5W + 3.5W (32Ω load)
  • New 4.4mm balanced output with lead-free solder assembly
  • Inputs: XLR 3-pin balanced (switchable +4dBm/-10dBm) and RCA unbalanced
  • Outputs: XLR 4-pin balanced, dual XLR 3-pin L/R, TRS phone
  • Frequency response: 10Hz to 100kHz (-0.5dBm)
  • Dimensions: W330 × D247 × H104 mm | Weight: 6.1kg
  • Includes dedicated Pelican case for protection
Regular price $28,465.00
Sale price $28,465.00 Regular price
Unit price
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MASS-Kobo Model 491

MASS-Kobo Model 491

Regular price $28,465.00
Sale price $28,465.00 Regular price
Unit price

Twin-Balanced Monoblock Design

Featuring independent left and right power supplies—standard in high-end power amplifiers—this twin-balanced monoblock design incorporates four high-performance amplifiers. It delivers a clean, stress-free sound that makes you forget the amplifier is even there, truly a flagship model. With balanced outputs delivering over 3.5W + 3.5W (32Ω load), it drives even the extremely low-efficiency HIFIMAN SUSVARA with the highest sound quality. Inputs include RCA unbalanced and XLR 3-pin balanced, with a switchable reference input level of +4dBm / -10dBm on the balanced input.

Technical specifications

Type
Balanced Input/Output Stereo Headphone Amplifier
Inputs
Balanced XLR3-31 equivalent ×2, Unbalanced RCA ×2
Outputs
XLR 4-31 equivalent ×1, XLR 3-31 equivalent ×2 (L/R balanced), TRS stereo phone ×1
Input Impedance
Balanced: 3.7kΩ (XLR), Unbalanced: 20kΩ (RCA)
Reference Input Level
Balanced: +4 dBm / -10 dBm (switchable), Unbalanced: -10 dBm
Maximum Input Level
Balanced: +30 dBm (XLR), Unbalanced: +20 dBm (RCA)
Max Output Level (P-P)
Unbalanced: P-P 22V, Balanced: P-P 32V (32Ω load, 1kHz, THD+N 0.05%)
Max Output Level (RMS)
Unbalanced: 7.4V, Balanced: 10.7V (32Ω load, 1kHz, THD+N 0.05%)
Max Undistorted Output
Balanced: 3.5W + 3.5W, Unbalanced: 1.8W + 1.8W (32Ω load, 1kHz, THD+N 0.05%)
Residual Noise (Balanced Output)
Gain LOW: 90µV (Vol MIN) / 100µV (Vol MAX)
Gain MID: 90µV (Vol MIN) / 120µV (Vol MAX)
Gain HI: 260µV (Vol MIN) / 490µV (Vol MAX)
Frequency Response
10Hz – 100kHz (-0.5dBm), 17Hz – 50kHz (-0.2dBm)
Power Supply
AC 100V – 240V, 50Hz/60Hz
Current Consumption
0.9A (at AC 100V)
Dimensions (W × D × H)
330 × 247 × 104 mm (excluding protrusions)
Weight
6.1 kg (unit only)
Packed Weight
11.2 kg (including Pelican case)
Accessories
Power cable, dedicated Pelican case

Shipping and Returns

RETURNS

Elise Audio has a standard 14-day return / exchange policy for electronic products (DAC/DAP):

  • Must be returned in like-new factory condition 
  • Must include all original packaging and accessories
Please note that the return shipping cost is to be paid by the customer.

Read our full Returns, Warranty & Terms of service by clicking here

SHIPPING

We offer a range of delivery options to suit your purchasing needs. The options are presented to you at the checkout, in an easy to understand way.

Most orders for In-Stock items are shipped within 1 to 3 business days (Monday to Friday, except bank holidays), subject to stock availability and security checks. Please ensure you provide a valid phone number for us to contact you should verification of your identity be required.

For More information about our Shipping Policy please click here

Warranty

Products purchased from Elise Audio are supplied with a manufacturer warranty that is specified on the product page on our website. Most products come with a 1Y manufacturer warranty (or 3 months for B-grade, open box, refurbished, ex-demo and second hand items). The manufacturer's warranties are limited to physical defects in the materials, parts and workmanship used in making the product. Abnormal conditions, deliberate abuse and damage due to accidents, operator's error, or unauthorized service attempts are excluded from any warranty claims. Faulty goods returned under the manufacturers warranty are to be returned to Elise Audio at the cost of the customer. Elise Audio will cover the cost of shipping the repaired or replacement product back to the customer.

Twin-Balanced Monoblock Design

Featuring independent left and right power supplies—standard in high-end power amplifiers—this twin-balanced monoblock design incorporates four high-performance amplifiers. It delivers a clean, stress-free sound that makes you forget the amplifier is even there, truly a flagship model. With balanced outputs delivering over 3.5W + 3.5W (32Ω load), it drives even the extremely low-efficiency HIFIMAN SUSVARA with the highest sound quality. Inputs include RCA unbalanced and XLR 3-pin balanced, with a switchable reference input level of +4dBm / -10dBm on the balanced input.

Type
Balanced Input/Output Stereo Headphone Amplifier
Inputs
Balanced XLR3-31 equivalent ×2, Unbalanced RCA ×2
Outputs
XLR 4-31 equivalent ×1, XLR 3-31 equivalent ×2 (L/R balanced), TRS stereo phone ×1
Input Impedance
Balanced: 3.7kΩ (XLR), Unbalanced: 20kΩ (RCA)
Reference Input Level
Balanced: +4 dBm / -10 dBm (switchable), Unbalanced: -10 dBm
Maximum Input Level
Balanced: +30 dBm (XLR), Unbalanced: +20 dBm (RCA)
Max Output Level (P-P)
Unbalanced: P-P 22V, Balanced: P-P 32V (32Ω load, 1kHz, THD+N 0.05%)
Max Output Level (RMS)
Unbalanced: 7.4V, Balanced: 10.7V (32Ω load, 1kHz, THD+N 0.05%)
Max Undistorted Output
Balanced: 3.5W + 3.5W, Unbalanced: 1.8W + 1.8W (32Ω load, 1kHz, THD+N 0.05%)
Residual Noise (Balanced Output)
Gain LOW: 90µV (Vol MIN) / 100µV (Vol MAX)
Gain MID: 90µV (Vol MIN) / 120µV (Vol MAX)
Gain HI: 260µV (Vol MIN) / 490µV (Vol MAX)
Frequency Response
10Hz – 100kHz (-0.5dBm), 17Hz – 50kHz (-0.2dBm)
Power Supply
AC 100V – 240V, 50Hz/60Hz
Current Consumption
0.9A (at AC 100V)
Dimensions (W × D × H)
330 × 247 × 104 mm (excluding protrusions)
Weight
6.1 kg (unit only)
Packed Weight
11.2 kg (including Pelican case)
Accessories
Power cable, dedicated Pelican case
RETURNS

Elise Audio has a standard 14-day return / exchange policy for electronic products (DAC/DAP):

  • Must be returned in like-new factory condition 
  • Must include all original packaging and accessories
Please note that the return shipping cost is to be paid by the customer.

Read our full Returns, Warranty & Terms of service by clicking here

SHIPPING

We offer a range of delivery options to suit your purchasing needs. The options are presented to you at the checkout, in an easy to understand way.

Most orders for In-Stock items are shipped within 1 to 3 business days (Monday to Friday, except bank holidays), subject to stock availability and security checks. Please ensure you provide a valid phone number for us to contact you should verification of your identity be required.

For More information about our Shipping Policy please click here

Products purchased from Elise Audio are supplied with a manufacturer warranty that is specified on the product page on our website. Most products come with a 1Y manufacturer warranty (or 3 months for B-grade, open box, refurbished, ex-demo and second hand items). The manufacturer's warranties are limited to physical defects in the materials, parts and workmanship used in making the product. Abnormal conditions, deliberate abuse and damage due to accidents, operator's error, or unauthorized service attempts are excluded from any warranty claims. Faulty goods returned under the manufacturers warranty are to be returned to Elise Audio at the cost of the customer. Elise Audio will cover the cost of shipping the repaired or replacement product back to the customer.

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