The JJ 239 class A SET Mono-Blocks are the epitome of purity. They feature a single JJ ECC99 proprietary driver and a single JJ 2A3-40 per side/chassis. JJ pulls an impressive 10 watts per side out of this arrangement. An ideal mate with the JJ 243 preamp, this is one of the ultimate SET mono-block configurations. As with all the JJ HIFI audio amps the 239 features in-house built components where applicable. Custom double c-core vacuum potted output transformers and fully regulated DC filaments throughout. You can choose the color combination you would like by clicking on the "Customize” button. ***Deposit info: At this time all HIFI amps are sold on a custom order basis. The price shown in your cart is the deposit for a PAIR of JJ 239 Mono Blocks. Once we receive your deposit we will contact you to confirm the lead time and your choice of finishes. Lead Time: Average 4-8 weeks. Shipping: A pair of the JJ 239 Mono Blocks are big and together weigh about 90 Lbs! We typically ship them by FedEx 3 day service however we will contact you so can choose how you would like it shipped.