Kaiju 300B Amplifier Kit


Do you have super efficient speakers? You can learn more about the DC Filament Supply upgrade for this kit at this link.



This product has a universal power transformer and can be used worldwide by following the wiring instructions in the manual. Please note that international customers will need to provide their own power cord.

SKU: KAI Category:

Kaiju. It’s Japanese for “strange beast”.

And our new Kaiju 300B amp is indeed a beast, capable of 8 watts per channel in stereo configuration and 16 watts as a monoblock. You will need to order two kits for a 16 watt stereo monoblocks setup – you’ll get a 10% discount when you do. Kaiju has even better performance than our premium Paramount amp with a universal power transformer, your choice of AC or DC filaments, and the biggest and best transformers we have ever made.

Your pre-order will be charged the day the kit is ordered. We do this to allow cash in advance payment to our vendors to keep the price you pay as low as possible. DIY audio is a very focused esoteric market. We are a small staff with a large passion, attempting to offer the broadest range of kits possible to those interested in this exclusive pursuit of ultra high quality audio reproduction, Thus each kit is manufactured and packed to order, and the production and packaging schedule is influenced by demand. Please understand that our shipment can take up to 4 to 8 weeks when demand is high. You may check how shipping is progressing for a kit by looking here.

Additional information

Weight 33 lbs
Dimensions 18 x 14 x 10 in
Upgrade Options

Basic Kaiju, Add the DC Filament Supply

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We have moved! Check the contact page for more info. Coming soon, the newly updated Reduction 1.1 phono preamp with universal power transformer. Dismiss