Avantone CV12 Upgrade Service

Our comprehensive upgrade for the Avantone CV-12 replaces the entire signal path within the microphone -- capsule, circuit, tube, and transformer -- resulting in a world-class tool that rivals commercial mics costing $2500.

About the Mod

The CV-12 contains a typical Chinese tube mic circuit, the so-called "CCDA" topology, with a transformer whose turns ratio is too high. The capsule voicing tends to have an exaggerated top end, and a thin bottom end, giving the mic a somewhat harsh sound.

None of those components survive the upgrade process. We install our RK-12 capsule, which is voiced like the AKG CK-12. We install a new tube circuit, based on what was used in the vintage Telefunken ElaM 251 (arguably the most famous vocal mic ever made). Unlike the original circuit, ours is a true single-triode design. We implement it with premium components, including a custom made output capacitor that was chosen after auditioning a dozen different parts.

How it Works

After you buy this service, see our Service Policies page for instructions on packing and shipping your mic. Be sure to print the Service Request form linked from that page.

Send us the microphone and power supply. It is not necessary, nor recommended, to send us the shockmount or cables or case. But it is critical to pack the mic and power supply carefully; both are heavy enough to damage themselves if the box is dropped.

The typical turnaround time is 5 business days. We can provide more detailed turnaround time estimates after you purchase the service.

Because this upgrade replaces the mic's entire signal path, it can be used on microphones whose capsule, tube, circuit, or audio transformer has failed. The upgrade does not replace the PSU, but we do offer various power supply replacement and upgrade options at additional cost, if your mic's PSU has failed or exhibits hum or noise problems.

Compatibility

This upgrade is compatible with the Avantone CV-12 and TnC ACM-1200. Both of these models have switches for pad and filter features; these switchable features will still work after the upgrade.

Costs

The mod service includes the parts, installation, testing, and return shipping (domestic US only) from our shop back to you. 

Availability

This mod service is open to US residents only, or to non-residents who are shipping the finished mic to a US address.

(Residents of other countries might find that it costs less to purchase a finished microphone.)

Optional Upgrades

We build custom tube mic cables with Gotham GAC7 wire and Neutrik connectors. This cable is superior to the thin, compromised stuff that claims to be Gotham brand sold on Amazon. We source the cable directly from Gotham in Switzerland.

If your budget allows for a superior power supply, see our VPS options.

We also have a superior clamp for the CV-12 shockmount.