Even cold and traveling though the current Bomb Cyclone from Oregon to California the A21+ is so much better than the A23. More bass, way more clarity, not so veiled on top as the A23. This unit is still cold too.
The $599 Topping pre90 works great with the adjustable gain on the A21+. For, the $3K I paid in total for the A21+ and Topping pre90 this is heck of a good sound.
I have had 2 amps work with the Topping pre90, the Parasound A21+ and Benchmark AHB2. Both have adjustable gain.
I also had 2 amps that were awful with the Topping pre90. The CODA #8 and the LSA Voyager 350 GAN. The amps sounded way too loud.
If you can make the Topping pre90 work with your amp then it is a screaming bargain. It has similar character as the incredible Benchmark LA4/HPA4 preamps.
The $599 Topping pre90 works great with the adjustable gain on the A21+. For, the $3K I paid in total for the A21+ and Topping pre90 this is heck of a good sound.
I have had 2 amps work with the Topping pre90, the Parasound A21+ and Benchmark AHB2. Both have adjustable gain.
I also had 2 amps that were awful with the Topping pre90. The CODA #8 and the LSA Voyager 350 GAN. The amps sounded way too loud.
If you can make the Topping pre90 work with your amp then it is a screaming bargain. It has similar character as the incredible Benchmark LA4/HPA4 preamps.