Pace 2025 MKII with Vu Meters

amrutmhatre90

Well-Known Member
Joined
Sep 25, 2020
Messages
1,006
Points
113
Location
Mumbai
Hello guys,

I got this Pace 2025 MKII integrated amplifier in beat up condition few days back with 2 puny speakers and a passive subwoofer, no idea which brands.
IMG-20220119-WA0004_copy_799x449.jpg

IMG-20220119-WA0006_copy_449x799.jpg

IMG-20220119-WA0009_copy_799x449.jpg

The speaker terminals where broken and left channel used to cut out or not play at all.

I don't know the specs for it, tired looking up on the Internet but nothing.
First thing I did was open it up and started cleaning it out. Lots and lots of dust, webs and small dead insects.

20220120_204511_copy_1600x900.jpg
After some cleaning, this is how it looked. Something to look at is this amplifier doesn't have any vents and guess what, no HeatSinks! Transistors are mounted on the chassis, chassis acts as heatsink.

20220121_133225_copy_1600x900.jpg
Fixed the speaker terminals and checked if left channel was back, but to my surprise it stopped working completely now! The vu meters also showed no movement on left channel.

20220120_204504 (1)_copy_1600x900.jpg
Got my multimeter and started checking all connections and transistors. While cleaning and dusting noticed these two boys were loose.
Got headphones and connected using 6.5mm jack on front, even here the left channel was dead.

20220120_202414_copy_1600x900.jpg
Turned the unit upside down, opened the bkttom part, checked and saw the joints and paths were fried for the above loose parts.

20220120_202418_copy_1600x900.jpg
Got wires and replicated the right channel joints. Used some old laying wires. And voala, it works. Left channel came back to life.

Everything put together, connected small speakers to B and Subwoofer to A. Can play both inputs together. Sounds decent.
20220121_133009_copy_1092x615.jpg
20220121_133058_copy_798x1205.jpg 20220121_133209_copy_1449x816.jpg

Might use this on my desktop bench where I normally work. Can use headphones too.

Few questions:
1) Don't know the specs of the subwoofer, but amp is not heating much when used. Could it cause any problem?

2) Would be pairing with 3020i or 3010i speakers on desktop, planning to use subwoofer.
 
Last edited:

efernand1

Well-Known Member
Joined
Jul 6, 2012
Messages
5,478
Points
113
Location
Mumbai
I am aware of this Stereo Amp and PACE was quite a famous brand during 1997 etc. My friend had it and it had decent power to drive most bookshelf and tower speakers then. The Arphi AA140 Stereo Integrated Amp I owned for quite sometime was almost similar design inside with no heat sink...i put external Aluminum plates on the Amp back Body with small DC fans to cool it. (Something like what a computer processor has today with heatsink and fan).

Cubes seem to be of SPACE audio or possible DNM. The subwoofer would have Drivers of JVC or other brands which are supposedly 30-60 watts RMS. Lots of dealers tried to copy the famous Bose Acousticmass design.

My friend and self used to make these kind of subwoofers then (college days) all experiments including cubes and hence that how we know most of the dealers at Lamington Road.
 
Last edited:

ShantaramChari

Active Member
Joined
Jan 24, 2021
Messages
134
Points
28
Location
Mumbai
Hello guys,

I got this Pace 2025 MKII integrated amplifier in beat up condition few days back with 2 puny speakers and a passive subwoofer, no idea which brands.
View attachment 66393

View attachment 66394

View attachment 66395

The speaker terminals where broken and left channel used to cut out or not play at all.

I don't know the specs for it, tired looking up on the Internet but nothing.
First thing I did was open it up and started cleaning it out. Lots and lots of dust, webs and small dead insects.

View attachment 66396
After some cleaning, this is how it looked. Something to look at is this amplifier doesn't have any vents and guess what, no HeatSinks! Transistors are mounted on the chassis, chassis acts as heatsink.

View attachment 66397
Fixed the speaker terminals and checked if left channel was back, but to my surprise it stopped working completely now! The vu meters also showed no movement on left channel.

View attachment 66398
Got my multimeter and started checking all connections and transistors. While cleaning and dusting noticed these two boys were loose.
Got headphones and connected using 6.5mm jack on front, even here the left channel was dead.

View attachment 66400
Turned the unit upside down, opened the bkttom part, checked and saw the joints and paths were fried for the above loose parts.

View attachment 66401
Got wires and replicated the right channel joints. Used some old laying wires. And voala, it works. Left channel came back to life.

Everything put together, connected small speakers to B and Subwoofer to A. Can play both inputs together. Sounds decent.
View attachment 66402
View attachment 66403 View attachment 66404

Might use this on my desktop bench where I normally work. Can use headphones too.

Few questions:
1) Don't know the specs of the subwoofer, but amp is not heating much when used. Could it cause any problem?

2) Would be pairing with 3020i or 3010i speakers on desktop, planning to use subwoofer.
Great find bro for low power listening. I have one similar amplifier from Dnm model 2025 which the pcb design is same as your pace 2025 but the output transistors are 2n3055 also it does not have vu meters.

Regards.
 

amrutmhatre90

Well-Known Member
Joined
Sep 25, 2020
Messages
1,006
Points
113
Location
Mumbai
Sad note, the left channel though is playing but it sounds distorted. Earlier thought it was the speaker, but lazy me did not swap the speakers and check.

Connected amp to QA 3010i speakers to know the left channel is still bad and not the speaker.

20220121_180838_copy_1600x901.jpg

Narrowed down to a 220 resistor, which is bad. Has black marks around it, maybe burnt. Since I don't have the exact one, will be sending it to a frnd who will fix this.
 
Wharfedale Linton Heritage Speakers in Red Mahogany finish at a Special Offer Price. BUY now before the price increase.
Top