---
product_id: 14650010
title: "Amplifier Tube (T-KT77-JJ-MP)"
brand: "jj electronics"
price: "1045 kr"
currency: DKK
in_stock: true
reviews_count: 8
url: https://www.desertcart.dk/products/14650010-amplifier-tube-t-kt77-jj-mp
store_origin: DK
region: Denmark
---

# 25W max plate power Apex matched pairs & quads Octal base for reliable fit Amplifier Tube (T-KT77-JJ-MP)

**Brand:** jj electronics
**Price:** 1045 kr
**Availability:** ✅ In Stock

## Summary

> 🎶 Unleash Pure Power & Precision in Every Note

## Quick Answers

- **What is this?** Amplifier Tube (T-KT77-JJ-MP) by jj electronics
- **How much does it cost?** 1045 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/14650010-amplifier-tube-t-kt77-jj-mp)

## Best For

- jj electronics enthusiasts

## Why This Product

- Trusted jj electronics brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted for durability and stable operation, making your setup future-proof and performance-ready.
- • **Power Your Sound:** Delivers a robust 25W max plate power for rich, dynamic audio performance.
- • **Universal Octal Base:** Designed with a standard octal base ensuring seamless compatibility with your amplifier.
- • **Precision Matched Sets:** Choose from singles, Apex matched pairs, or quads for perfectly balanced tone and consistency.
- • **Elevate Your Audio Game:** Ideal for audiophiles and professionals craving that warm, vintage tube sound with modern reliability.

## Overview

The T-KT77-JJ-MP is a high-quality octal KT77 power tube delivering up to 25 watts of plate power. Available as singles or Apex matched pairs and quads, it ensures optimal tonal balance and reliability for audiophiles and professionals seeking vintage warmth with modern consistency.

## Description

Octal power tube (Max plate watts = 25W), Kt77, available in singles, Apex matched pairs or Apex matched quads - Please select from list.

## Features

- Octal power tube (max plate Watts = 25W),
- KT77
- Available in singles, Apex matched pairs or Apex matched quads - Please select from List

## Product Details

- **Brand:** JJ Electronics
- **Recommended Uses For Product:** Vacuum Cleaner
- **Unit Count:** 1 Count
- **Reusability:** Single Use
- **Item dimensions L x W x H:** 4.6 x 3.2 x 1.6 inches

## Images

![Amplifier Tube (T-KT77-JJ-MP) - Image 1](https://m.media-amazon.com/images/I/71eTR0wFZ1L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great tubes for a guitar amp
*by S***A on March 8, 2012*

I bought these to replace the power amp tubes in my Marshall Guitar amplifier. The amp came stock with four EL34 Winged C tubes. I put in a set of JJ EL34 tubes and it "freshened up" the amps tone. I then put these KT77's in and the amp just came alive. It's not that the EL34's sound bad, they sound great. But the KT77's sound better, at least to my ears. The bottom end is tighter, the mids are more punchy and the highs are smoother. It sounds like these tubes shifted the overall sound up in the frequency range a little.The price was reasonable and the shipping was super fast. Would buy these again from this seller in a heartbeat.

### ⭐⭐⭐⭐ Maybe not a “Drop-in” replacement for EL34’s
*by M***E on June 6, 2018*

I read in several message boards that KT77’s are a great “drop-in replacement” for EL34’s in Guitar amplifiers because they sound like “HD”.While they did seem to lend themselves well to the clean channel on my amplifier (Carvin V3), they made the gain channels sound fizzy. The Mids and Highs were simply too bright and no amount of tweaking the tone stack seemed to help.I took it to my local amp tech and he rebiased the amp for the tubes and it still didn’t help. He told me that KT’s are great for HiFi systems, but rarely seem to translate well in a guitar amp.JJ’s makes a great Tube. They functioned exactly as they should have, but ultimately I swapped back to EL34’s and have learned my lesson about these alleged “Drop-in” replacements.They might work great if you don’t use high gain amps and choose to get your drive from pedals, but they don’t seem to play well with amp gain.

### ⭐⭐⭐⭐⭐ Wow, try them!!!
*by J***A on August 2, 2019*

This tubes really surprised me. I was not expecting them to sound as good as they do. I compared the JJ KT77 with Gold Lion KT66, winged =C= 6L6GC, and Tung Sol 7581A (really great tubes also) in my VTA ST 70 HI-FI amp and the JJ's are my favourite. Also the Apex matching and burn in process used by this seller is really good! You pretty much get the best set of tubes you can possibly get, for more info go to their site. I'm very happy with this tubes and I will be purchasing more in the future.

## Frequently Bought Together

- JJ Electronics Amplifier Tube (T-KT77-JJ-MP)
- New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes
- JJ Electronics Amplifier Tube (T-12AX7-S-JJ)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-08*