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Twenty 5 Twenty SMD Opamp

Twenty 5 Twenty SMD Opamp
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5.0 average, based on 3 reviews

$49.50AUD inc GST for Australian Customers
(Approx $29.54USD outside Australia)

(Quantity discounts available)

Product Information
Quantity Discounts
Stock Level155

Twenty 5 Twenty SMD opamp is an amazing sounding extreme precision version of the old original 2520 opamp. 

  • Voltage range of +/-12v to +/-25v.
  • Precision 1% matched input transistor diff pair
  • Precision 1% matched second stage transistor diff pair.
  • Improved thermal layout for least DC offset on output.
  • Improved output transistor thermal bias current control.
  • Opamp is open unpotted design for servicing and repairs.
  • Now Gold PCB.

We test the Twenty 5 Twenty at +/-25v into a 50ohm load at extreme overload.

Works perfectly on our BA BAD BAN PCB's or any 2520 type mic pre, EQ & Comps including 2500 comp. 

 

Test results for TWENTY 5 TWENTY against vintage API 2520 in BA kit

TestAPI 2520 TWENTY 5 TWENTY
Frequency response (from 40 Hz to 15 kHz), dB:+0.10, -0.56+0.10, -0.56
Noise level, dB (A):-108.6-108.9
Dynamic range, dB (A):108.5108.8
THD, %:0.00210.0019
IMD + Noise, %:0.0220.021
DC offset at opamp output pin+/-25mV+/-1mV
Min to Max +/-power rails+/-12v to +/-20v+/-12v to +/-25v

 

Frequency response in BA kit

Spectrum graph


 

Noise level in BA kit @ 10dB of gain

Spectrum graph

Basically noise floor of computer testing setup except for 50Hz peak due to open BA PCB kit on bench with no case.

You can save money on this item when you purchase several at a time. The table below shows the minimum quantities required to benefit from this offer, and how much they'll cost.


QuantityPrice per unit
1$49.50AUD
2+$48.40AUD
4+$47.30AUD
8+$46.20AUD

Customer Reviews

Average Rating: 5

You will definitely love it

12345
I was simply out of words is to how clean and noise free this opamp is. I purchased two of them for my Lola mic pres, they are a perfect fit to this 500 series Lola mic pres. Definitely worth the buy (Thu Feb 08 2024, 08:37 am )

Well made, sound great and quiet.

12345
My API 2500+ Opamps were really noisy and were sounding terrible. I struggled with them for over a year until I noticed that JLM have great reviews of these Opamps on Gearspace. I took the plunge and I’m glad I did. They sound amazing and the noise floor is very low. The build quality is very high. Also, the manual gain on the API 2500+ now gives me the punch and bite that I wanted. Highly recommended! (Sat Nov 12 2022, 16:03 pm )

Still going strong and sounding great

12345
Had these sitting in my 2500 for over a year still going strong and sounding great. Went straight in with no issues when one my potted op amps died. (Fri Apr 22 2022, 13:59 pm )

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