Highland Dynamics Dual Delta 4-7 MK.2: Premium Valve Mic Preamp & D.I. Unit
The Highland Dynamics Dual Delta 4-7 MK.2 is an exceptional dual-channel, valve-driven microphone preamp and direct injection (D.I.) unit meticulously hand-crafted for audiophiles, studio professionals, and musicians seeking authentic vintage sonic character combined with modern versatility. Inspired by iconic 1960s British circuitry, the Delta 4-7 MK.2 is available exclusively as a limited edition of only 20 units, each built with precision and premium-grade components.
Exceptional Hand-Built Quality
Each Highland Dynamics Delta 4-7 MK.2 preamp is hand-assembled using traditional point-to-point wiring techniques, solid-core copper wire, and oversized film capacitors, ensuring unmatched durability and reliability. The use of esteemed paper and oil capacitors from West-Cap, Vitamin Q, and NYT, combined with 2-watt carbon composition resistors, guarantees robust and clear signal amplification. Precision 1% resistors further enhance stability in critical non-audio circuits. Transformer-balanced input and output stages feature high-quality EF86 tubes for amplification and 6DJ8 tubes for smooth output drive, offering unparalleled sonic warmth, depth, and clarity.
Flexible Input and Output Controls
The Delta 4-7 MK.2 provides switchable input impedance settings of 150Ω and 37.5Ω, accessed through dedicated transformer taps, allowing perfect tonal matching with a variety of microphones. A variable input pad positioned after the input transformer and D.I. input grants precise control from microphone to line-level signals, maintaining audio integrity and fine-tuning capabilities. The additional output pad, located after the output transformer, helps manage hot signals without compromising the sonic characteristics of your recordings.
Four Versatile Gain Stages
Gain flexibility is integral to the Delta 4-7 MK.2, offering four distinct feedback-controlled modes: Low, Medium, High, and Open. The Low mode provides pristine, hi-fi sound with controlled harmonic content, ideal for transparent recordings. In contrast, the Open mode eliminates negative feedback completely, achieving maximum gain and vibrant harmonic saturation, perfect for vintage-style warmth and character. Intermediate Medium and High modes provide additional versatility, enabling nuanced tonal shaping for any recording scenario.
Advanced Bass Management
A three-position bass-cut filter allows precise management of low frequencies with selectable cutoff points at approximately 60 Hz, 150 Hz, and 300 Hz. This high-pass filtering occurs early in the pre-gain stage, enabling clean, defined low-end response and eliminating unwanted rumble or excessive bass energy at the earliest point in the signal path.
Creative Cascading and Routing Possibilities
The Dual Delta 4-7 MK.2 boasts innovative cascading functionality, allowing users to route channels sequentially for rich tube saturation reminiscent of classic console sound. Cascading the second channel into line-level settings and carefully adjusting the pads produces dynamic tube-driven overdrive and saturation, ideal for creative mixing and mastering effects. Additionally, the integrated D.I. input ensures exceptional direct instrument recording, while the THRU output supports seamless integration of external effects pedals and processors, allowing simultaneous capture of pristine and processed stereo signals.
Ideal Applications
Perfectly suited for high-end recording studios, mastering engineers, and musicians demanding vintage character with contemporary functionality, the Highland Dynamics Dual Delta 4-7 MK.2 is a versatile solution for vocals, acoustic instruments, drums, electric guitars, and more. The combination of classic valve warmth, detailed tonal controls, and advanced routing possibilities positions this preamp as an indispensable tool for audio professionals.
Unlock the full potential of your recordings with the Highland Dynamics Dual Delta 4-7 MK.2—where timeless valve-driven sound meets unmatched audio flexibility.
